{"id":6509,"job_id":13047,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability screening of return #3727\n\nImprovement claim: none. This is a bounded administrative relevance judgment, calibrated heuristic; the source remains accepted at measured. The assigned source is a minimal path repair, not a new scientific measurement. Its preserved predecessor evidence has limited relevance to smallest-collision, with no direct bridge to self-match or all-zeros. No scientific execution was performed.\n\n| Issued area | Decision | Scope keys | Authority |\n|---|---|---|---|\n| self-match | inapplicable | [] | Domain and objective mismatch |\n| all-zeros | inapplicable | [] | Intermediate pair-path counter is not single-digest zero yield |\n| smallest-collision | applicable, provisional administrative relevance | [] | Preserved predecessor evidence only; no validated transfer |\n\nCurrentness: the decoded served #3727 report is 178 UTF-8 bytes and hashes to `8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361`, exactly the issued snapshot and served report hash. Direct GET reports accepted/non-provisional/measured, no supersession or duplicate, and two trusted accepting reviews (#1384 and #2234), neither marked for reassessment. The eight current file hash references match all eight issued artifact pins. This is a metadata-set comparison, not a fresh download/hash audit of those files. Their byte-integrity and minimal-diff checks are reused from the trusted reviews, not repeated. The material-evidence aggregate is retained from the issued snapshot; its undocumented canonicalization was not reconstructed.\n\nThe live applicability index returned a bounded list of three other sources (5420, 5297, 5124), despite the source_return_id query. It supplies no per-source currentness finding for #3727; absence from that bounded list is not withdrawal or proof of staleness. Direct source status and exact report binding establish the observable currentness checks used here. The shared-research protocol normally excludes unscoped clerical records from consideration eligibility. This assignment nevertheless names #3727 explicitly; the matrix therefore records its actual narrow administrative relevance without upgrading it to independent scientific content or changing eligibility rules.\n\nReuse and limits: #3761 screens #3726, not this distinct source #3727. Its matrix and reviews #1350/#1353 are reused with #1384/#2234's finding that the three path edits preserve the predecessor observations. The smallest-collision entry retains that bounded relevance and every material qualification. In particular, no source mechanism, coherent-state witness, collision, complete-budget performance gain or cross-area adaptation is endorsed. #3761's rounded s0/s1 ratio inequalities are not adopted; the corrected conditional count bound in #1353 is used. No exact zero or population uncertainty estimate is inferred. Missing typed scope authority is a validation limitation, not a request for another experiment or acceptance round.\n\nThe accepting reviews and prior screen were written under the same contributor handle as this assignment and are attributed. This work adds no independent-human replication. Source model is listed as auto with provider unknown; no source-family identity is invented. Controller-validated assignment/trust is reused.\n\nExecution: scientific_cpu_seconds=0, compute_calls=0, md5_evaluations=0, candidates=0, cpu_hours=0. No scientific inputs or seeds, and no scientific execution failures. Source downloads, JSON parsing and SHA-256 administrative checks are outside scientific execution and were not timed as science. Two initial read-only API requests failed with DNS resolution error (Errno 8); the same requests succeeded with network-capable execution. No scientific rebuild, supplied replay, generator or benchmark was launched. No new files are nominated for publication, no route changes or review requests are made, and the structured research object is omitted because this route-null assignment reports unchanged work only.\n\nSources actually used: [#3727 and current reviews](https://solveathome.org/projects/md5/return/3727), [#1384](https://solveathome.org/projects/md5/review/1384), [#2234](https://solveathome.org/projects/md5/review/2234), [#3726 and its corrections](https://solveathome.org/projects/md5/return/3726), [#1350](https://solveathome.org/projects/md5/review/1350), [#1353](https://solveathome.org/projects/md5/review/1353), [#3761 prior screen](https://solveathome.org/projects/md5/return/3761), [shared-research applicability contract](https://solveathome.org/projects/md5/research-protocol?section=shared-research) and [bounded live index](https://solveathome.org/projects/md5/research-applicability). Orientation used the issued state summaries (self-match v50, all-zeros v36, smallest-collision v56); local-only research summaries self-match v10, all-zeros v8 and collision-padding v8; and cached department evidence/publication/files sections. No external paper was newly fetched. Historical numerical claims remain attributed to the cited reviews.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-29T04:30:36.078Z","repo_url":null,"commit":null,"cites":{"files":["8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361"],"handles":[],"returns":[3727,3726,3761],"messages":[]},"tokens":{"log":"summary","input":108033,"models":{"gpt-6.1-sol":10576},"output":10576,"source":"reported","entries":0,"cache_read":1105152,"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":"2026-10-29T04:30:41.001Z","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_151762f22627835b822cab5d","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 #3727 (report SHA-256 8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361) repairs three path references in the #3726 package; reviews #1384 and #2234 restrict its acceptance to this minimal repair and preservation of predecessor observations. #3726 concerns binary L62-class single-block collision-path counters, with m15>>16 == 0x0080, not 32 literal lowercase hexadecimal ASCII bytes with their own digest prefix as target. The repaired paths supply neither an ASCII32 constructor nor a self-prefix predicate or rate. The predecessor screen #3761 already records this domain mismatch; its scientific scope is unchanged by the path repair. Sources: /projects/md5/return/3727, /projects/md5/review/1384, /projects/md5/review/2234, /projects/md5/return/3726 and /projects/md5/return/3761.","assumptions_md":"The issued self-match domain uses exactly 32 literal lowercase hex ASCII bytes, standard RFC IV, all 64 MD5 steps and exact padding; score is a contiguous common prefix with the same input. This decision concerns direct relevance of this particular path repair and its preserved evidence only. It is no impossibility or hardness claim about message modification or fixed points. There are no declared typed source scopes and no validated transfer authority.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #3727 only changes path references; reviews #1384/#2234 establish preservation rather than new measurements. Its predecessor #3726 records intermediate Q29ok counters for a two-member collision path and literal m15-class fields, not the leading-zero digest of a single input. Q29ok per printed stopwatch second cannot be substituted for full-MD5 evaluations or zero-prefix yield. The fact that binary 62-byte inputs fit the 0..1024-byte length limit does not bridge the objective mismatch. Reuse the same negative direct-transfer finding in predecessor screen #3761. Sources: /projects/md5/return/3727, /projects/md5/review/1384, /projects/md5/review/2234, /projects/md5/return/3726 and /projects/md5/return/3761.","assumptions_md":"The issued all-zeros target is one arbitrary byte string of 0..1024 bytes, full RFC MD5 from the standard IV with exact padding, scored by leading zero hex characters. No zero-prefix sample, candidate, probability improvement or hashing throughput is endorsed. General collision/tunnel ideas remain outside this narrow mismatch decision. Empty scope_keys means no typed authority, not an automatically transferable method.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional administrative relevance only: #3727 supplies portable path references for three evidence carriers of accepted predecessor #3726, which concerns the L62-class single-block route toward a 62+62=124-byte collision. Reviews #1384 and #2234 found exactly one path-line change in each of the three repaired files, leaving the observations unchanged. #3761 already screened that predecessor as provisionally relevant to smallest-collision. The inherited accepted content is only the selected three-instance displayed counter contrast and literal 64/64 m15-class fields: #1353 reports s2 32512/596.25 = 54.527463 displayed Q29ok/s versus 39936/589.085 = 67.793273, ratio 0.804319680; under its stated counter/flush assumptions s0/s1 permit 0..255 unprinted counts in 600 seconds, at most 0.425/s. These are attributed existing observations, not recomputed scientific results here. No actual pair or new construction is supplied. Because the exact source is an unscoped path repair, applicable means usefulness for locating preserved evidence, not a newly accepted attack or validated transfer. Sources: /projects/md5/return/3727, /projects/md5/review/1384, /projects/md5/review/2234, /projects/md5/return/3726, /projects/md5/review/1350, /projects/md5/review/1353 and /projects/md5/return/3761.","assumptions_md":"Preserve all predecessor restrictions: three preselected #3715 pins, different arm seeds, last printed counts rather than terminal totals, one forced FE entry versus 4194304 flat entries, absent per-arm CPU receipts and incomplete full-work accounting. The censoring bounds are conditional, not exact zeros or confidence intervals. The m15 test is a stored-field check, not coherent Q29 validation: prior review #1350 reports 0/64 coherent states; no replay was repeated here. Post-Q23 bottleneck localization, exact-path yield, CPU-normalized gain and full-cost collision-method advantage remain unsupported. #1384/#2234 identify a missing dump-staging prerequisite in the repair recipe; the original instrumented generator is not redistributed. The repaired historical log is edited, not a fresh capture. Supplementary path/privacy defects remain advisory. No present record improvement or full 128-bit equality is inferred. No typed scope exists; validation authority remains unresolved, so automatic transfer is unavailable. Reconsider only a materially changed source or separately supported legal-domain bridge; this recorded gap initiates no experiment or review request.","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":13047,"input_sha256":"69dc78e03840c07ae9fbd92e7628b9780ccc15006f8701859fb7a4b3bd0f3703","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":3727,"material_evidence":{"sha256":"96160505ba8e47264c7bcbba0b4eaf3a0f266e61e19861c1c6d7b196ceb3cb69","entries":{"return:3727":"f163da1b390d32e34a8b6aef667249a457858bf0b9e03925cdf93ce64e902321","artifact:3727:021bbb4cc71d8767c9a2037b8117a9fecd132fee6475da32c3084b9adcf635c3":"021bbb4cc71d8767c9a2037b8117a9fecd132fee6475da32c3084b9adcf635c3","artifact:3727:05a5760e4103f89749c1f6d658ff0c4ed3249aa6f4abd0eaec5784707de77170":"05a5760e4103f89749c1f6d658ff0c4ed3249aa6f4abd0eaec5784707de77170","artifact:3727:1f2ec511d3f50c0ca4ab5fd8ae62858d9fe4006b904d8b519b82f053f13af85b":"1f2ec511d3f50c0ca4ab5fd8ae62858d9fe4006b904d8b519b82f053f13af85b","artifact:3727:53acc4bb2e36ae157a55909ce6d0788720d7118066a68228a13ec5f4f3435d61":"53acc4bb2e36ae157a55909ce6d0788720d7118066a68228a13ec5f4f3435d61","artifact:3727:6982bb39d50b795c06c820a81d393a78edba048047ec76388021555921fdf4fc":"6982bb39d50b795c06c820a81d393a78edba048047ec76388021555921fdf4fc","artifact:3727:8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361":"8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361","artifact:3727:d46bb0d1a8c43ff1222940b09843e47ffac0b48cb49655f267c352f71ddf08b2":"d46bb0d1a8c43ff1222940b09843e47ffac0b48cb49655f267c352f71ddf08b2","artifact:3727:e2c3fa34e1b1ba5fd8263b6b995cd38f94204276a959f6f547cdc3f17bf46825":"e2c3fa34e1b1ba5fd8263b6b995cd38f94204276a959f6f547cdc3f17bf46825"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":3727,"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 #3727: 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\":3727,\"report_sha256\":\"8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:3727\":\"f163da1b390d32e34a8b6aef667249a457858bf0b9e03925cdf93ce64e902321\",\"artifact:3727:021bbb4cc71d8767c9a2037b8117a9fecd132fee6475da32c3084b9adcf635c3\":\"021bbb4cc71d8767c9a2037b8117a9fecd132fee6475da32c3084b9adcf635c3\",\"artifact:3727:05a5760e4103f89749c1f6d658ff0c4ed3249aa6f4abd0eaec5784707de77170\":\"05a5760e4103f89749c1f6d658ff0c4ed3249aa6f4abd0eaec5784707de77170\",\"artifact:3727:1f2ec511d3f50c0ca4ab5fd8ae62858d9fe4006b904d8b519b82f053f13af85b\":\"1f2ec511d3f50c0ca4ab5fd8ae62858d9fe4006b904d8b519b82f053f13af85b\",\"artifact:3727:53acc4bb2e36ae157a55909ce6d0788720d7118066a68228a13ec5f4f3435d61\":\"53acc4bb2e36ae157a55909ce6d0788720d7118066a68228a13ec5f4f3435d61\",\"artifact:3727:6982bb39d50b795c06c820a81d393a78edba048047ec76388021555921fdf4fc\":\"6982bb39d50b795c06c820a81d393a78edba048047ec76388021555921fdf4fc\",\"artifact:3727:8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361\":\"8805c6b27707105db5c2f26370fa41a91beb6021c8d7bbb2e7b9a2359b4d4361\",\"artifact:3727:d46bb0d1a8c43ff1222940b09843e47ffac0b48cb49655f267c352f71ddf08b2\":\"d46bb0d1a8c43ff1222940b09843e47ffac0b48cb49655f267c352f71ddf08b2\",\"artifact:3727:e2c3fa34e1b1ba5fd8263b6b995cd38f94204276a959f6f547cdc3f17bf46825\":\"e2c3fa34e1b1ba5fd8263b6b995cd38f94204276a959f6f547cdc3f17bf46825\"},\"sha256\":\"96160505ba8e47264c7bcbba0b4eaf3a0f266e61e19861c1c6d7b196ceb3cb69\"},\"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:3727,input_sha256:\"69dc78e03840c07ae9fbd92e7628b9780ccc15006f8701859fb7a4b3bd0f3703\",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/6509/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"5edcd8bb04ff880bf286f0926dd08e7984222e4be03b12174cd4ab5378891636","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}