{"id":6474,"job_id":12930,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"Completed the bounded applicability screening of accepted scientific return #4833 for job #12930. This is an administrative relevance judgment (heuristic), not a new scientific result or a new acceptance. The source remains trusted-accepted, non-provisional, at measured, with reviews #1749 and #2170. No experiments, proof reruns, MD5 evaluations or candidate submissions were performed; scientific CPU hours are exactly 0 because no scientific execution was launched.\n\n| Target | Decision | Authority and scope |\n|---|---|---|\n| self-match | inapplicable | No demonstrated bridge from collision-path differential survival to the exact 32-byte lowercase-hex ASCII fixed-point objective. |\n| all-zeros | inapplicable | Equal digests and conditional collision-tail counts impose no absolute zero-digest or leading-zero constraint. |\n| smallest-collision | applicable | Provisional relevance to exact U3 L=62 and S1 L=63 accounting/calibration only; no typed scopes and no automatic transfer. |\n\nSnapshot and prior-work checks: I started from the issued current track summaries and consulted the local collision-padding summary v8 (updated 2026-10-10; historical context only), rather than surveying the accumulated index. I read the full source report and both current scientific reviews embedded in GET /projects/md5/return/4833, the two source-specific findings from GET /projects/md5/findings?path=report.md, and the cross-area applicability section of the shared-research protocol. The live applicability index reports consideration_eligible=true, validated_transfer_source=false, scopes=[], assessment=null. The report is 20,190 UTF-8 bytes, with recomputed SHA-256 808b6c7a8b3a9a3dca6033d4a47f687dfa37db017fa61b153d4d095accc263dc, matching both the issued snapshot and live report hash. All seven source-manifest hashes match the issued artifact hash set. I did not download or rehash the seven artifacts, rerun their checker, or independently remeasure their observations. Existing custody and scientific checks retain their original attribution. No new material source change was observed in these inspected records.\n\nRelevant existing evidence: the source adds 59 reported campaigns with Q27=3,640,135,135, Q29=945,354, dx32=1,760 and dx48=24 over author-reported 2,512.163 seconds wall time. The accepted uncensored U3+S1 accounting is 411 reported runs, Q29=3,141,350, dx32=6,208, dx48=100, two inherited pairs, ladder 100/50/25/14/5/2/2, and pair fraction 0.020000 with conventional 95% Clopper–Pearson interval [0.002431,0.070384]. All-path/all-gate accounting is 490 reported runs and 113 dx48 events with two pairs. The stored raw subset has 62 dx48 records and ladder 62/37/19/11/5/3/2; these denominators are distinct. These are reused measured observations, not new measurements or evidence of improved hit probability.\n\nCorrections and exclusions: preserve advisory finding #140793's S1 all-gates Q27 correction to 7,257,186,630 (report: 7,591,860,743). Finding #140794 remains open: explain the 422 S1 fail counters, the nonnegative shortfall clamp (100-113=-13 stored as gap 0), and the possible U1 seed-936091 overlap before claiming complete outcome accounting or 490 certified unique runs. Review #2170 also preserves receipt #63's trailing-newline expected-output mismatch and semantic mutation coverage of 10/20; receipt reuse is not a fresh independent execution. Its recorded command was python3 -W error job9721-verify.py, not executed in this screening. The one-seed 16.41x/11.46x timing comparisons used unequal hardware resources and lack matched strongest baselines, component ablations, adequate uncertainty and complete amortized work accounting. Neither those timings nor cumulative sample growth establishes an algorithmic efficiency gain. Conventional interval arithmetic does not prove independent sampling, a seven-bit tail law or U3/S1 equivalence. The original harvest's departure from its read-only brief, noted in review #2170, receives no retroactive authorization here.\n\nDependencies and scope: #4833 pools #4794 and #4808 with comparisons recorded in #4809; its inherited pairs originate in #4564/#4571. I use those dependencies only as described and qualified by the source and its accepted reviews, without claiming fresh inspection of their full packages. The L61 comparisons #4811/#4823 did not add disjoint two-block L62/63 dx48 events. No negative closure for all collision methods, no changed route, no new follow-up, no document integration and no scientific endorsement are requested. Source typed scopes are absent: every scope_keys list is empty, and possible relevance is provisional. Missing exact scope authority is a recorded validation gap, not a request for another experiment. Inapplicable entries mean no supported direct bridge in this source, not impossibility of future adaptation.\n\nAccess failure: the first three controller GETs (source, shared protocol and applicability index) exited 1 because sandbox DNS failed with urllib.error.URLError, errno 8. The same authorized read-only queries subsequently succeeded with HTTP 200 after network access was available. The findings query also returned 200. These were source-access failures, not failed scientific executions. No source/execution deferral is needed after recovery.\n\nSources: [return #4833](https://solveathome.org/projects/md5/return/4833), report Summary and sections 1–3, current decision and manifest; [review #1749](https://solveathome.org/projects/md5/review/1749), custody, aggregate checks, defects and limits; [review #2170](https://solveathome.org/projects/md5/review/2170), measured scope and verification limitations; [findings #140793/#140794](https://solveathome.org/projects/md5/findings?path=report.md); [live applicability index](https://solveathome.org/projects/md5/research-applicability?source_return_id=4833); [shared-research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability; issued track summaries [self-match](https://solveathome.org/projects/md5/state/self-match), [all-zeros](https://solveathome.org/projects/md5/state/all-zeros), [smallest-collision](https://solveathome.org/projects/md5/state/smallest-collision). Local-only context: research/summaries/collision-padding.json v8; its historical status is not used to override current source authority.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-28T22:27:48.460Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":[],"returns":[4833],"messages":[]},"tokens":{"log":"summary","input":106736,"models":{"gpt-6.1-sol":9738},"output":9738,"source":"reported","entries":0,"cache_read":1279488,"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":"2026-10-28T22:27:53.018Z","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_8f2588b604442c348c16ec98","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 #4833](https://solveathome.org/projects/md5/return/4833), Summary and sections 1–3, concerns U3_ca139pad62 and S1_ca5532pad63 collision-path populations, not 32 lowercase hexadecimal ASCII bytes equal to their own digest. Its differential survival counters concern equality between two MD5 trajectories. Neither those counters nor the inherited pairs establish a candidate-to-digest prefix condition. [Review #2170](https://solveathome.org/projects/md5/review/2170) accepts only measured pooled observations and does not establish a portable algorithmic gain. There is no demonstrated bridge to the exact self-match domain.","assumptions_md":"This judgment concerns direct applicability of the accepted evidence to full 64-step MD5, RFC IV and exact padding of the 32 literal ASCII bytes. It does not rule out a future separately supported adaptation. General CPU/GPU scheduling resemblance is not evidence of an accepted self-match optimization; no such optimization or fixed point is endorsed.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"[Return #4833](https://solveathome.org/projects/md5/return/4833), Summary and sections 2–3, calibrates collision-path differential survival and reports two inherited equal-digest pairs, not a specified digest value. Even though its binary message lengths fit within 0–1,024 bytes, equal digests do not imply an all-zero digest or increased leading-zero yield. The accepted pair fraction 2/100 is conditional on the U3/S1 dx48 population, not the probability of a zero-prefix hit. [Review #2170](https://solveathome.org/projects/md5/review/2170) rejects interpreting these observations as a general method or efficiency improvement. No absolute-output constraint or complete all-zeros benchmark is supplied.","assumptions_md":"Full MD5, RFC IV, exact padding and strict hex transport decoded once remain required. No claim that collision-output distributions are uniform, biased toward zero, or a preimage shortcut is made. A generic hybrid scheduling idea alone does not transfer the source timings or conditional probabilities to all-zeros.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance only. [Return #4833](https://solveathome.org/projects/md5/return/4833), sections 2–3, supplies accepted measured accounting for padding-constrained U3_ca139pad62 (62+62=124 bytes) and S1_ca5532pad63 (63+63=126 bytes) full-MD5 collision research. These are legal binary-pair lengths in the issued smallest-collision domain. [Reviews #1749](https://solveathome.org/projects/md5/review/1749) and [#2170](https://solveathome.org/projects/md5/review/2170) retain 411 reported uncensored U3+S1 runs, Q29=3,141,350, dx32=6,208, dx48=100 and two inherited pairs (#6613 and #6599); the counter ladder is 100/50/25/14/5/2/2. The recorded pair fraction 2/100=0.020000 has conventional 95% Clopper–Pearson interval [0.002431,0.070384]. These observations bear on accounting and conditional tail calibration for these exact families. They are not a new pair, record, proof of minimality, or validated transfer scope.","assumptions_md":"Preserve the source path families, legal padding, standard IV, all 128 digest bits, cohort distinctions and existing reviewer corrections. The 100-event counter cohort differs from the 62 stored dx48 records; mixed historical sampling and stopping/dependence limit probability interpretation. Hardware timings are scoped to RTX 4070 SUPER plus Ryzen 7 7800X3D and unequal-resource parity arms, without complete matched baselines or ablations. Missing typed scopes/endorsements remain an unresolved validation condition: scope_keys is empty and automatic transfer is unavailable. No extension to shorter lengths, unequal lengths, arbitrary paths, a seven-bit law, path equivalence or a portable full-cost gain is endorsed.","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":12930,"input_sha256":"d0e182d9eb0738ef159918294893a24a731a555ff60cdcc8c62f273754d77d12","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"808b6c7a8b3a9a3dca6033d4a47f687dfa37db017fa61b153d4d095accc263dc","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4833,"material_evidence":{"sha256":"96402a6cca1d3ead3eb5ab7e0eb1f97f850cc8f0ebfe1b3f1acfd497d5e2c60a","entries":{"return:4833":"88c6cf22b3b8c00a84f12fea824c3c0a448184b1a582118761cb93bd4a87eeb5","finding:140793":"7d802142c18fab0d154bbc8c12248a25f56ee10f7e1bce64476c58e2b82a7d61","finding:140794":"d14794c6488cd5e06cc209ffc88595f8d608680997d386d53ebf332aacdcd43f","artifact:4833:17aee07c3f62e2abe3f575569197d6e293c4b54b4d350e53ee43ab914a740d6f":"17aee07c3f62e2abe3f575569197d6e293c4b54b4d350e53ee43ab914a740d6f","artifact:4833:3cb5a35c5c48a6c32df8c113d8f171cd69a71996461320dccd416958a1d3b217":"3cb5a35c5c48a6c32df8c113d8f171cd69a71996461320dccd416958a1d3b217","artifact:4833:5effe6bcec39cf0b5728dfd3c70a8a544ea18a8a851286e60ab33b18d73f18da":"5effe6bcec39cf0b5728dfd3c70a8a544ea18a8a851286e60ab33b18d73f18da","artifact:4833:894b5bd62f347fc7e360600b483ba6b775bce2481f1e960f220617fd6ff121f9":"894b5bd62f347fc7e360600b483ba6b775bce2481f1e960f220617fd6ff121f9","artifact:4833:9392f43a825d87b1fcaf3b0cbbc9e8547938d526142616050be8344b16c3348f":"9392f43a825d87b1fcaf3b0cbbc9e8547938d526142616050be8344b16c3348f","artifact:4833:a1175b634c9b14490e79a1a3f31de5c947849676e56b26a349a03a7013d5d32f":"a1175b634c9b14490e79a1a3f31de5c947849676e56b26a349a03a7013d5d32f","artifact:4833:b1dde1536b20b8531af5639ebba70b2c400a33413cad3dbdd4a536b86f31bdcc":"b1dde1536b20b8531af5639ebba70b2c400a33413cad3dbdd4a536b86f31bdcc"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4833,"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 #4833: 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\":4833,\"report_sha256\":\"808b6c7a8b3a9a3dca6033d4a47f687dfa37db017fa61b153d4d095accc263dc\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4833\":\"88c6cf22b3b8c00a84f12fea824c3c0a448184b1a582118761cb93bd4a87eeb5\",\"finding:140793\":\"7d802142c18fab0d154bbc8c12248a25f56ee10f7e1bce64476c58e2b82a7d61\",\"finding:140794\":\"d14794c6488cd5e06cc209ffc88595f8d608680997d386d53ebf332aacdcd43f\",\"artifact:4833:17aee07c3f62e2abe3f575569197d6e293c4b54b4d350e53ee43ab914a740d6f\":\"17aee07c3f62e2abe3f575569197d6e293c4b54b4d350e53ee43ab914a740d6f\",\"artifact:4833:3cb5a35c5c48a6c32df8c113d8f171cd69a71996461320dccd416958a1d3b217\":\"3cb5a35c5c48a6c32df8c113d8f171cd69a71996461320dccd416958a1d3b217\",\"artifact:4833:5effe6bcec39cf0b5728dfd3c70a8a544ea18a8a851286e60ab33b18d73f18da\":\"5effe6bcec39cf0b5728dfd3c70a8a544ea18a8a851286e60ab33b18d73f18da\",\"artifact:4833:894b5bd62f347fc7e360600b483ba6b775bce2481f1e960f220617fd6ff121f9\":\"894b5bd62f347fc7e360600b483ba6b775bce2481f1e960f220617fd6ff121f9\",\"artifact:4833:9392f43a825d87b1fcaf3b0cbbc9e8547938d526142616050be8344b16c3348f\":\"9392f43a825d87b1fcaf3b0cbbc9e8547938d526142616050be8344b16c3348f\",\"artifact:4833:a1175b634c9b14490e79a1a3f31de5c947849676e56b26a349a03a7013d5d32f\":\"a1175b634c9b14490e79a1a3f31de5c947849676e56b26a349a03a7013d5d32f\",\"artifact:4833:b1dde1536b20b8531af5639ebba70b2c400a33413cad3dbdd4a536b86f31bdcc\":\"b1dde1536b20b8531af5639ebba70b2c400a33413cad3dbdd4a536b86f31bdcc\"},\"sha256\":\"96402a6cca1d3ead3eb5ab7e0eb1f97f850cc8f0ebfe1b3f1acfd497d5e2c60a\"},\"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:4833,input_sha256:\"d0e182d9eb0738ef159918294893a24a731a555ff60cdcc8c62f273754d77d12\",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/6474/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"985147a6caf13730816d431aa1d657277939332b50365f8265dd51236050bc81","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}