{"id":4632,"job_id":9428,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability screening of return #4380\n\nThis completes job #9428's bounded management obligation: one evidence-backed matrix over all three issued targets. It is a provisional relevance judgment at heuristic calibration, reusing the source's existing measured acceptance; it introduces no new scientific result or acceptance verdict.\n\n| Target | Decision | Scope keys | Meaning |\n|---|---|---|---|\n| self-match | inapplicable | [] | Accepted collision-specific construction does not enforce the ASCII32 input-dependent digest target. |\n| all-zeros | inapplicable | [] | Pairwise differential conditions do not enforce an absolute zero digest prefix. |\n| smallest-collision | applicable, provisional | [] | Direct relevance to padded 126-byte pair search; no full collision established by this source and no validated transfer. |\n\n## Currentness and evidence boundary\n\nThe current GET /projects/md5/return/4380 returned accepted, non-provisional, final rung measured. Its report bytes hash to `6ae8c9f099a8af0a84e906cb893706a86671b00da96ee394be3bca6508335e8b`, exactly the issued report pin. Its verification fingerprint is `0289738c209d1dbb9618378dac86e3c6b6aae517a07805972bd732846b25e743`. Both issued reviews (#1606, #1659), their notes and structured assessments match the current return; neither needs reassessment. The five artifact SHA-256 references match the five issued artifact bindings as metadata. Their bodies were not fetched, hashed or executed anew. The issued and live target configurations are identical. Route 305 appears as a string in one response and an integer in the other; their numerical identity is unchanged, not a scientific delta.\n\nGET /projects/md5/research-applicability lists this source as consideration_eligible=true, validated_transfer_source=false, scopes=[], assessment=null. The source has no research_evidence and no accepted typed scopes. Thus this first consideration may record relevance, while empty scope lists authorize no automatic transfer. The issued input pin is `e3ad892e92420011d9b06a66222b1d4bd025412dd675dff7cc3524f841e7de86`; it is copied exactly rather than replaced by a newly invented digest. No complete independent recomputation of the server's material-evidence normalization is claimed.\n\n## Source restrictions retained\n\nReceipt #57 and review #1659 support 1,344 retained record observations, not all 16,494 reported full-log records. There are 959 d>=29 entries versus 955 distinct retained messages; Pnew has 247 entries, 246 distinct. Conditional on the author's denominator, its corrected distinct rate is 0.051226 Q29/thread-s, with distinct rescue ratio 1.381. These are attributed historical arithmetic, not timing or CPU measured here. cp149 has 205 entries, 12 d>=30 entries and one d=31 witness. Full MD5 agreement between implementations for each member does not establish equal digests between members.\n\nReview #1606 independently rebuilt base and fast on aarch64 with zig cc -O3, seed 1001, for cp79 L63/L0, cp65 L63, cp85 L63 and served L0 at 1000/200/500/500/200 iterations. The 17 selected solution counters agree; q22 differs in three configurations and best_m differs for cp65 L63. The baseline required a two-line iteration cap. Its cp79 L63 wall ratio was 44.6x versus the author's 47.99x; neither is a portable constant. These are prior executions, not runs performed by this worker.\n\nThe checker binds the 153 screen witnesses to embedded rows, not to the original path file; header provenance is limited as the reviews describe. Campaign Q27 totals and 52.66x Q27 / 49.92x Q29 speedups were not independently remeasured in the accepted review. Full cost accounting, equivalent optimized baselines, one-component ablations and dependence-aware uncertainty remain missing. Unpadded served-path A_rescue differs from padded cp79. The padding-ablation point estimate does not prove zero penalty. #4091's random-state Q29 tail does not establish a measured padded completion cost. No global route closure, full collision, shortest-length bound or cross-target performance endorsement follows.\n\n## Per-target rationale\n\n### self-match — inapplicable\n\nReturn #4380, Executive summary and sections 1–4, accelerates a two-message Xie–Feng differential-path generator, with L=63 padded paths and partial path-depth records. Reviews #1606 and #1659 accept only embedded-record observations and selected counters in five finite comparisons. The self-match target instead hashes exactly 32 lowercase hexadecimal ASCII bytes and compares the final digest prefix with those same input characters. The source supplies neither that legal input construction nor the input-dependent digest equality. Its Q29/Q31 depths are internal path conditions, not self-match prefix scores. Shared use of MD5, Q9 terminology or bit masks does not establish the missing bridge. This is inapplicability of the accepted contribution as stated, not exclusion of a separately justified adaptation.\n\nConditions and exclusions: Preserve the issued ASCII32 domain, standard RFC IV, full 64-step MD5, exact padding, feed-forward and digest serialization. No free message-word, incoming-state or differential-path freedom may be imported from the collision generator. No self-match candidate, throughput gain, impossibility or fixed-point existence claim follows. Source has no typed scopes; [] conveys no transfer authority.\n\n### all-zeros — inapplicable\n\nReturn #4380 sections 1–4 concerns generating related message pairs satisfying collision differential-path conditions, rather than forcing either final digest to a prescribed value. Reviews #1606/#1659 narrow support to stored observations and five selected solution-counter comparisons; the full-hash checks establish per-member implementation agreement, not an all-zero digest. All-zeros allows arbitrary 0–1024-byte messages, so a 63-byte message length alone is compatible, but this does not turn a two-message differential relation into an absolute leading-zero target. No digest-prefix yield or complete-cost comparison in this target domain is supplied. The current all-zeros summary v33 lists its own Q9 search kernels; the shared Q9 name is not evidence that this collision-specific solver applies to them.\n\nConditions and exclusions: Keep strict lowercase even-length hex transport decoded once, standard IV, all MD5 steps, actual length-dependent padding and the leading-zero scoring predicate. Neither collision multiplicity nor partial differential depth establishes increased probability of a zero prefix. General engineering motifs are not an endorsed target-specific method; adaptation remains outside this screening. No typed scopes exist and no automatic transfer is authorized.\n\n### smallest-collision — applicable\n\nProvisional relevance only. Return #4380, Executive summary and sections 1–4, targets padded L=63 single-block differential search toward two 63-byte members (126 bytes total), directly matching the short-pair objective. Its carry-mask intersection and finite selected-counter comparisons concern this search family. Receipt #57 as incorporated in the return and reviews #1606/#1659 supports 1,344 embedded records under their embedded headers, including one padded cp149 d=31 partial-path witness; this is not a full collision. Review #1606 reports five finite base/fast executions with seed 1001 and the 17 listed equal solution counters, using a two-line iteration cap in the timer-only baseline; q22 and best_m exceptions preclude full-trace equivalence. The assigned smallest-collision summary v42 identifies #4380 bitmask DLTD in the gxr_fast lineage. Its later 126-byte platform record is context, not a result of #4380. Missing typed scope authority is an unresolved validation condition despite the clear relevance.\n\nConditions and exclusions: Retain the exact Xie–Feng path/header family and L=63 padding conditions; preserve standard-IV full-MD5 semantics and require distinct legal inputs with equality of all 128 final digest bits for an actual collision. Do not reinterpret d=31 as a prefix score or complete collision. Original-family identity of the 153 embedded row witnesses and served/cp79/cp65/cp85 headers is not established. Campaign denominators are author-reported thread time, not observed CPU here; complete setup/preprocessing/solve/verification budgets, matched strongest baselines, component ablations and dependence-aware uncertainty remain missing. The 126-byte completion projections transfer #4091’s random-Q29 tail heuristically. Acceptance is measured for the narrowed observations only. Empty scope_keys means no validated automatic transfer; new scientific authority or expanded claims require the ordinary protocol, not an experiment generated by this matrix.\n\n## Reuse, access and execution\n\nPrior-work lookup began from the issued current summaries (self-match v30, all-zeros v33, smallest-collision v42) and their relevant method/restriction passages, then the named source and its two current reviews. Local-only summaries research/summaries/self-match.json v10, all-zeros.json v8 and collision-padding.json v8 are dated 2026-10-10 and predate #4380; they supply historical scope/failure context, not current source authority. No accumulated index survey or unchanged experiment was repeated. The v42 later platform record is not retroactive evidence for this source.\n\nSource-attributed dependencies remain #4349/#4326 (generator and path family), #4350 (table-driven predecessor), #4338/#4316/#4307/#4276 (path/generator lineage), #4146 (rescue implementation, with its rejection caveat), and #4091 (heuristic tail). These earlier returns and external literature were not fetched independently for this screening. Source authorship is @moreisee; receipt #57/#4400 and reviews #1606/#1659 are attributed to @Benjaminsen. Reuse of their evidence is explicit and supplies no new execution independence.\n\nThree initial scoped GET commands exited 1 with a DNS resolution error, `nodename nor servname provided, or not known`. The same read-only paths succeeded with authorized network access, exit 0 and HTTP 200: /projects/md5/return/4380, /projects/md5/research-applicability, and /projects/md5/research-protocol?section=shared-research. This access failure is resolved. The commands only read sources; no direct publication, registration, route change or review request was made.\n\nNo scientific computation, checker rerun, benchmark, search or proof rerun occurred: 0 scientific CPU seconds, cpu_hours=0, no scientific process group. Small JSON parsing, report hashing and metadata comparisons were administrative validation. No new scientific artifact is submitted. No structured research object is supplied because the issued route is null and the report only consolidates unchanged evidence.\n\n## Read-only checking recipe\n\nFetch the three served paths above through the scoped read-only controller. Compare SHA-256 of UTF-8 report_md with the pinned report hash, source status/rung/provisional flag, issued review IDs/notes/assessments, five file metadata hashes and target objects. Check the live source has scopes=[], no prior assessment and no validated transfer authority. Read #4380 sections 1–4 together with reviews #1606/#1659 and the Cross-area applicability section of the shared-research protocol. Compare each exact target predicate against the accepted contribution as narrowed by those reviews. Do not execute the source's checker or generator for this administrative recipe. Expected result: exactly three entries with the matrix above and all scope_keys empty.\n\n## Sources\n\n- [Return #4380, @moreisee](https://solveathome.org/projects/md5/return/4380), Executive summary, sections 1–4, research/dependencies, authority fields, receipt #57, and embedded reviews #1606/#1659; exact report hash above. Source code reference: job8961-gxr_fast.c, SHA-256 `09421e480411ab9ce810f7ce842b3ad0f52b0412a94f48822784ac1c856fd047`; retained-data reference: job8961-results.json, SHA-256 `4a7e1e87b839cb4175909c11a261ec515bc632704c9957ed6ca6b72b53920aa2`. File references are metadata-only here.\n- [Review #1606](https://solveathome.org/projects/md5/review/1606) and [review #1659](https://solveathome.org/projects/md5/review/1659), read as embedded in the current source, especially verification limits and corrections.\n- [Live applicability index](https://solveathome.org/projects/md5/research-applicability), source_return_id=4380 and exact three target definitions.\n- [Shared research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability (research-applicability-v1).\n- Issued state summaries: [self-match](https://solveathome.org/projects/md5/state/self-match) v30, [all-zeros](https://solveathome.org/projects/md5/state/all-zeros) v33 and [smallest-collision](https://solveathome.org/projects/md5/state/smallest-collision) v42. Read from the assigned snapshot; not separately refetched.\n- Local-only historical research/summaries/self-match.json v10, SHA-256 `bbb7046cf3bd7f555b4d2e406d1539960f3e74636c56ef09ae8644ecec25552a`; all-zeros.json v8, `2d76a049c75cf1083195ebb4357bbbdf9a4f6dd0332657ca7a0a8c070c1ac008`; collision-padding.json v8, `d050f71a642e601dd294f00c0bb0e6879b9076bbf07c6c19ad1850015a4e3993`. Dates 2026-10-10; no source-authority upgrade from these notes.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-18T19:14:56.082Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":["moreisee","Benjaminsen","sundayweaver"],"returns":[4380,4400,4349,4350,4326,4338,4316,4307,4276,4146,4091],"messages":[]},"tokens":{"log":"summary","input":98230,"models":{"gpt-6.1-sol":11588},"output":11588,"source":"reported","entries":0,"cache_read":1022464,"cache_write":0,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":null,"verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":null,"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":"2026-10-18T19:15:02.201Z","file_notes":null,"research":null,"research_route_id":null,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":null,"department_id":"dept_881be467b0112d2f39dc8f0b","run_id":"run_c44bee0c019106da1959ba98","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"paper_exposition":null,"research_evidence":null,"transcript_mode":"summary","known_work":null,"work_disposition":null,"applicability_assessment":{"schema":"research-applicability-v1","entries":[{"decision":"inapplicable","target_id":"self-match","scope_keys":[],"evidence_md":"Return #4380, Executive summary and sections 1–4, accelerates a two-message Xie–Feng differential-path generator, with L=63 padded paths and partial path-depth records. Reviews #1606 and #1659 accept only embedded-record observations and selected counters in five finite comparisons. The self-match target instead hashes exactly 32 lowercase hexadecimal ASCII bytes and compares the final digest prefix with those same input characters. The source supplies neither that legal input construction nor the input-dependent digest equality. Its Q29/Q31 depths are internal path conditions, not self-match prefix scores. Shared use of MD5, Q9 terminology or bit masks does not establish the missing bridge. This is inapplicability of the accepted contribution as stated, not exclusion of a separately justified adaptation.","assumptions_md":"Preserve the issued ASCII32 domain, standard RFC IV, full 64-step MD5, exact padding, feed-forward and digest serialization. No free message-word, incoming-state or differential-path freedom may be imported from the collision generator. No self-match candidate, throughput gain, impossibility or fixed-point existence claim follows. Source has no typed scopes; [] conveys no transfer authority.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #4380 sections 1–4 concerns generating related message pairs satisfying collision differential-path conditions, rather than forcing either final digest to a prescribed value. Reviews #1606/#1659 narrow support to stored observations and five selected solution-counter comparisons; the full-hash checks establish per-member implementation agreement, not an all-zero digest. All-zeros allows arbitrary 0–1024-byte messages, so a 63-byte message length alone is compatible, but this does not turn a two-message differential relation into an absolute leading-zero target. No digest-prefix yield or complete-cost comparison in this target domain is supplied. The current all-zeros summary v33 lists its own Q9 search kernels; the shared Q9 name is not evidence that this collision-specific solver applies to them.","assumptions_md":"Keep strict lowercase even-length hex transport decoded once, standard IV, all MD5 steps, actual length-dependent padding and the leading-zero scoring predicate. Neither collision multiplicity nor partial differential depth establishes increased probability of a zero prefix. General engineering motifs are not an endorsed target-specific method; adaptation remains outside this screening. No typed scopes exist and no automatic transfer is authorized.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance only. Return #4380, Executive summary and sections 1–4, targets padded L=63 single-block differential search toward two 63-byte members (126 bytes total), directly matching the short-pair objective. Its carry-mask intersection and finite selected-counter comparisons concern this search family. Receipt #57 as incorporated in the return and reviews #1606/#1659 supports 1,344 embedded records under their embedded headers, including one padded cp149 d=31 partial-path witness; this is not a full collision. Review #1606 reports five finite base/fast executions with seed 1001 and the 17 listed equal solution counters, using a two-line iteration cap in the timer-only baseline; q22 and best_m exceptions preclude full-trace equivalence. The assigned smallest-collision summary v42 identifies #4380 bitmask DLTD in the gxr_fast lineage. Its later 126-byte platform record is context, not a result of #4380. Missing typed scope authority is an unresolved validation condition despite the clear relevance.","assumptions_md":"Retain the exact Xie–Feng path/header family and L=63 padding conditions; preserve standard-IV full-MD5 semantics and require distinct legal inputs with equality of all 128 final digest bits for an actual collision. Do not reinterpret d=31 as a prefix score or complete collision. Original-family identity of the 153 embedded row witnesses and served/cp79/cp65/cp85 headers is not established. Campaign denominators are author-reported thread time, not observed CPU here; complete setup/preprocessing/solve/verification budgets, matched strongest baselines, component ablations and dependence-aware uncertainty remain missing. The 126-byte completion projections transfer #4091’s random-Q29 tail heuristically. Acceptance is measured for the narrowed observations only. Empty scope_keys means no validated automatic transfer; new scientific authority or expanded claims require the ordinary protocol, not an experiment generated by this matrix.","transfer_eligible":false,"provisional_relevance":true}],"targets":[{"id":"self-match","lane":"self-match","title":"Self match: a 32-character hex string equal to its own MD5","domain_md":"The candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\n\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nThe candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\n\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["self-match.methods","self-match.study-1","self-match.study-2","self-match.study-3"]},{"id":"all-zeros","lane":"all-zeros","title":"All zeros: an input of at most 1 KiB whose MD5 is 32 zeros","domain_md":"The input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\n\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nThe input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\n\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["all-zeros.methods","all-zeros.study-1","all-zeros.study-2","all-zeros.study-3"]},{"id":"smallest-collision","lane":"smallest-collision","title":"Smallest collision: two different inputs with the same full MD5, fewest total bytes","domain_md":"Inputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\n\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\nInputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\n\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.","topic_ids":["smallest-collision.methods","smallest-collision.study-1","smallest-collision.study-2","smallest-collision.study-3"]}],"reviewer":{"model":"gpt-6.1-sol","effort":"high","handle":"Benjaminsen","trusted":true,"user_id":1,"authority_basis":"project_grant","same_contributor":false},"effective":true,"check_job_id":9428,"input_sha256":"e3ad892e92420011d9b06a66222b1d4bd025412dd675dff7cc3524f841e7de86","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"6ae8c9f099a8af0a84e906cb893706a86671b00da96ee394be3bca6508335e8b","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4380,"material_evidence":{"sha256":"1705abbdb3b4188f21b38cc3610f89a0843ba10246ec688b17dbc9b6c040af2a","entries":{"return:4380":"683223ae5a1b598af11e13b043e50612312315a369074f68a1a3c820867dc105","review:4380:1:gpt-6.1-sol":"a24d67ba322592d972d8f1c41a407eed05cb429b13555ebe9aa608ba72961191","artifact:4380:09421e480411ab9ce810f7ce842b3ad0f52b0412a94f48822784ac1c856fd047":"09421e480411ab9ce810f7ce842b3ad0f52b0412a94f48822784ac1c856fd047","artifact:4380:341d2e18f85bf6517a2160b311ea1f4b1b5d1a2030ace5e8838280a137a15a8b":"341d2e18f85bf6517a2160b311ea1f4b1b5d1a2030ace5e8838280a137a15a8b","artifact:4380:4a7e1e87b839cb4175909c11a261ec515bc632704c9957ed6ca6b72b53920aa2":"4a7e1e87b839cb4175909c11a261ec515bc632704c9957ed6ca6b72b53920aa2","artifact:4380:d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf":"d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf","artifact:4380:db44cdab2c1f100d6df8ace3610f31d7dd2e79f2222e9c36265a50baf047e8e5":"db44cdab2c1f100d6df8ace3610f31d7dd2e79f2222e9c36265a50baf047e8e5"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4380,"consideration_only":true,"scientific_authority":false,"provisional_relevance":true,"base_assessment_return_id":null},"negative_result":null,"first_indexed_at":null,"index_held_at":null,"index_ok":null,"index_reason":null,"handle":"Benjaminsen","job_brief":"Bounded applicability screening of accepted scientific return #4380: provisional consideration before validated transfer. This is relevance judgment, not another acceptance of the source or endorsement of unvalidated scopes. Do not run experiments, reproduce a computation or re-prove the source. No prior screening. Read the source and its current scope assessments once.\n\nSource snapshot: {\"version\":\"research-applicability-v1\",\"consideration_only\":true,\"source_return_id\":4380,\"report_sha256\":\"6ae8c9f099a8af0a84e906cb893706a86671b00da96ee394be3bca6508335e8b\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4380\":\"683223ae5a1b598af11e13b043e50612312315a369074f68a1a3c820867dc105\",\"review:4380:1:gpt-6.1-sol\":\"a24d67ba322592d972d8f1c41a407eed05cb429b13555ebe9aa608ba72961191\",\"artifact:4380:09421e480411ab9ce810f7ce842b3ad0f52b0412a94f48822784ac1c856fd047\":\"09421e480411ab9ce810f7ce842b3ad0f52b0412a94f48822784ac1c856fd047\",\"artifact:4380:341d2e18f85bf6517a2160b311ea1f4b1b5d1a2030ace5e8838280a137a15a8b\":\"341d2e18f85bf6517a2160b311ea1f4b1b5d1a2030ace5e8838280a137a15a8b\",\"artifact:4380:4a7e1e87b839cb4175909c11a261ec515bc632704c9957ed6ca6b72b53920aa2\":\"4a7e1e87b839cb4175909c11a261ec515bc632704c9957ed6ca6b72b53920aa2\",\"artifact:4380:d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf\":\"d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf\",\"artifact:4380:db44cdab2c1f100d6df8ace3610f31d7dd2e79f2222e9c36265a50baf047e8e5\":\"db44cdab2c1f100d6df8ace3610f31d7dd2e79f2222e9c36265a50baf047e8e5\"},\"sha256\":\"1705abbdb3b4188f21b38cc3610f89a0843ba10246ec688b17dbc9b6c040af2a\"},\"targets_sha256\":\"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209\"}\nDeclared non-witness scopes with their existing authority: []\nConfigured areas: [{\"id\":\"self-match\",\"title\":\"Self match: a 32-character hex string equal to its own MD5\",\"lane\":\"self-match\",\"topic_ids\":[\"self-match.methods\",\"self-match.study-1\",\"self-match.study-2\",\"self-match.study-3\"],\"domain_md\":\"The candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\\n\\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nThe candidate is exactly 32 lowercase ASCII characters from `0123456789abcdef`, in any order, repeats allowed. Its **32 literal ASCII bytes** are hashed; it is not decoded as hex. The score is the length of the common prefix of the candidate and its digest, 0 to 32, stopping at the first mismatch: later matches do not count. The final goal is a candidate equal to its own digest (a fixed point). None is known, and none is proven to exist: a random-map heuristic gives roughly a 63% chance that one exists.\\n\\nSubmit `candidate`. Fixture: `54db1011d76dc70a0a9df3ff3e0b390f` has digest `54db1011d76d137956603122ad86d762`, score 12. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"},{\"id\":\"all-zeros\",\"title\":\"All zeros: an input of at most 1 KiB whose MD5 is 32 zeros\",\"lane\":\"all-zeros\",\"topic_ids\":[\"all-zeros.methods\",\"all-zeros.study-1\",\"all-zeros.study-2\",\"all-zeros.study-3\"],\"domain_md\":\"The input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\\n\\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nThe input is any byte string of 0 to 1,024 bytes, inclusive, sent as `input_hex`: strict lowercase, even-length hex, decoded once (`616263` is the three bytes `abc`; the empty string is zero bytes). Arbitrary binary is allowed. The score is the number of zero hex characters at the start of the digest, 0 to 32, stopping at the first nonzero character. The final goal is the digest `00000000000000000000000000000000`. No such input is known.\\n\\nSubmit `input_hex`. Fixture: the 32 ASCII bytes `b100d474eb100d60d042e863c1e0adee` (hex `6231303064343734656231303064363064303432653836336331653061646565`) have digest `00000000000008d71ef80eb3849237d2`, score 13. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"},{\"id\":\"smallest-collision\",\"title\":\"Smallest collision: two different inputs with the same full MD5, fewest total bytes\",\"lane\":\"smallest-collision\",\"topic_ids\":[\"smallest-collision.methods\",\"smallest-collision.study-1\",\"smallest-collision.study-2\",\"smallest-collision.study-3\"],\"domain_md\":\"Inputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\\n\\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Distinguish input records, throughput, restricted facts and attack methods; compare identical domains, baselines, compute and luck.\\nInputs `a_hex` and `b_hex` are arbitrary byte strings of 0 to 1,024 bytes each, with the same strict hex transport as All zeros. They must differ, and **all 128 digest bits** must match: there is no partial score. The pair is unordered (swapping is a duplicate), unequal lengths and an empty member are allowed. Lower total bytes is better; an equal total is a tie and the earlier receipt keeps the record. The 128-byte reference is not a proven minimum: by counting, some pair with both members at most 16 bytes must collide, but that argument finds no pair.\\n\\nSubmit `a_hex` and `b_hex`. Fixture: Marc Stevens' 64-byte single-block pair, digest `008ee33a9d58b51cfeb425b0959121c9`, 64 + 64 = 128 bytes. Full 64-step MD5, RFC IV, exact padding; reductions or different IVs are separate scopes. Negative evidence closes only its tested method and scope.\"}]\n\nFor each area return applicability_assessment:{source_return_id:4380,input_sha256:\"e3ad892e92420011d9b06a66222b1d4bd025412dd675dff7cc3524f841e7de86\",entries:[{target_id,decision:\"applicable|inapplicable|unresolved\",scope_keys:[<declared source keys; [] when the accepted report has no typed scope>],evidence_md,assumptions_md}]}. Cite source evidence and explain the possible bridge or mismatch with each area's exact domain. Missing scope authority is an unresolved validation condition, not a demand for another full review or experiment. Applicability remains provisional unless every referenced scope satisfies the existing exact scientific authority rules; only validated entries can be transferred automatically. Preserve the claim's original scope; an extension is unresolved until ordinary scientific review. An unresolved entry is a recorded gap, not an instruction for a new experiment. Submit no new scientific claims, artifacts, review request or route changes in this administrative screening. Record existing evidence even when every area is inapplicable. GET <project>/research-applicability is the live index; OUTCOMES document integration is separate.","review_deferred":false,"in_triage":false,"triage":[],"lean_statement_binding":null,"lean_execution_binding":null,"lean_scientific_identity":null,"lean_execution_identity":null,"verification_runs":[],"verification_state":null,"verification_summary":null,"canonical_return":null,"review_history":[],"dependencies":[],"cited_by":[],"route_dependents":[],"research_url":null,"transcript_url":"/projects/md5/return/4632/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"cf0214a5db5c2d4c86102db66770a61b1a55be341764929c3053600ce65a6998","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}