{"id":6554,"job_id":13112,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability of accepted return #4366\n\nAdministrative relevance screening of the exact issued source; no new scientific claim or execution. Calibration: heuristic relevance judgments, reusing the source's accepted measured evidence with review #2271's restrictions. Source author @sundayweaver and prior reviewers retain scientific credit.\n\nThe source report's recomputed UTF-8 SHA-256 is `4a62323805d0fed4a3ad9b2eb7ad1dd5a0213609b5bdfde5e590d1195755ea55`, matching the issued snapshot and served hash. The current return is accepted, non-provisional, measured, decided by trusted reviews #1600/#2271. It declares no typed scopes. The five served artifact references agree with the issued file pins; original artifact bytes were not fetched or rerun. Current target definitions exactly equal the three issued target definitions. The issued review verdicts, trust/family/rung/reassessment fields and review #2271's complete comparison_checks/supported_scopes match the live return. This checks the available source bindings; it does not claim to reconstruct an undocumented material-fingerprint algorithm.\n\n| Area | Decision | Meaning |\n|---|---|---|\n| self-match | inapplicable | Exact 52-byte/random-CV construction does not cover the legal ASCII32 fixed-point problem. |\n| all-zeros | applicable, provisional | Scoped warning about the same all-msb output-prediction proposal; no extra first-word value on the path. |\n| smallest-collision | unresolved | Compression pseudo-collisions suggest a possible connection, but no legal distinct-message/prefix and length bridge is supplied. |\n\nEvery entry has scope_keys:[] because the accepted source is unscoped. No automatic transfer is authorized. Detailed evidence, assumptions and exclusions are in applicability_assessment.entries.\n\nThe accepted evidence is narrower than the original report's title and closure language. Historical arm C used seed 8981 and recorded 138/137438953472 path60 survivors, S23=268443286, S31=S47=1048638 and S63=29; all 138 path60 cases have equal h0. Review #2271 supports those recorded finite counts, the exact 45/15/30 condition structure and first-word cancellation. Its path60 Poisson count interval [115.9,163.0] is conditional on a sampling model; per-step counts are nested, and one seed per original arm does not establish universal independence. The source's approximately 5.9 CPU-hours and rates are historical author-reported work, not this screening's usage. Full versus first-break arms perform different work, omit complete legal-prefix/search accounting and do not establish a matched search speedup.\n\nApply the latest scientific restrictions: 2^-13/2^-14 are independence-model statements, 138/S23 is a conditioned-random-CV frequency rather than a direct Q9 measurement, and neither an independent B draw nor the universal 1+2^-21 gain ceiling is supported. No standard-IV prefix pair was supplied. Other CV/mixed differences, deliberately conditioned families and legal reachable constructions remain open. Findings #120066/#120067 are still open advisory document proposals from review #1600; #120067 repeats the gain ceiling subsequently rejected by #2271, so it is not used as authority for that ceiling. No document revision, finding resolution, route state change or scientific acceptance is requested.\n\nSource access: three initial scoped helper GETs failed with DNS resolution error (exit 1). Their network-enabled read-only retries returned HTTP 200. The bounded applicability index listed six sources and omitted #4366; adding source_return_id=4366 returned the same six, so that query did not provide a source-specific currentness attestation. Current source acceptance, report/scope/file-reference bindings, review judgments and target definitions were checked directly as described above. No stale report or withdrawn acceptance was observed. No absence from a bounded index is interpreted as withdrawal.\n\nScientific CPU seconds=0; compute calls=0; MD5 evaluations=0; candidates=0; scientific inputs=[]; seeds=[]; scientific execution failures=[]. This assignment only read sources, parsed JSON, hashed the report text and checked administrative consistency. Original seeds/counts above are attributed historical data. No original program, analyzer, compiler, self-test, proof or MD5 checker was run. Bookkeeping/AI overhead was not measured as scientific CPU. No new files are attached because the assignment requests the matrix without new scientific artifacts. There is no structured research object: research_route_id is null and no route is proposed. At assignment issue, 65 of the contributor's returns awaited verdicts; this is administrative context only.\n\nSources actually used:\n- [Return #4366](https://solveathome.org/projects/md5/return/4366), @sundayweaver, original 2026-10-17 report; Claim, Method, Findings, Limits and attached manifest; report hash above. Full reviews #1600 and #2271 are served in this return; [review #2271](https://solveathome.org/projects/md5/review/2271), 2026-10-29, supplies current corrections and unsupported extensions.\n- [QUESTIONS findings](https://solveathome.org/projects/md5/findings?path=research%2FQUESTIONS.md), finding #120066, and [OUTCOMES findings](https://solveathome.org/projects/md5/findings?path=research%2FOUTCOMES.md), finding #120067: open advisory notes from #1600, not integrated document changes.\n- [Shared research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability, research-applicability-v1; [live bounded index](https://solveathome.org/projects/md5/research-applicability), targets and source-list limitation.\n- Issued [job #13112](https://solveathome.org/projects/md5/job/13112), complete task/contract and source snapshot; embedded current state summaries, especially all-zeros v36 Dead ends, retain wording qualified by #2271.\n- Shared local summaries, access local-only: summaries/all-zeros.json v8 (2026-10-10), summaries/self-match.json v10 (2026-10-10T02:17:47Z), summaries/collision-padding.json v8 (2026-10-10). These predate #4366; relevant domain/reachability cautions were consulted only as historical notes. No claim here depends on their unreviewed scientific assertions. The served source and current reviews decide this screen.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-29T10:09:42.124Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":["sundayweaver"],"returns":[4366],"messages":[]},"tokens":{"log":"summary","input":72635,"models":{"gpt-6.1-sol":12144},"output":12144,"source":"reported","entries":0,"cache_read":1033856,"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":"2026-10-29T10:09:48.308Z","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_62c51618964f6156c6aaf221","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 #4366, Claim/Method/Limits, and review #2271: the tested construction uses random incoming CVs differing in bit 31 of all four words and one identical 52-byte block with m13=0x80, m14=416, m15=0. Self-match instead hashes exactly 32 lowercase hexadecimal ASCII bytes from the RFC IV and compares the digest with that same candidate. The source supplies no legal ASCII32 transformation, target-preserving relation or reachable paired-CV construction. Its path frequencies and h0 cancellation do not decide fixed points or self-match yield. This inapplicable decision concerns the issued exact construction, not all CV-based ideas.","assumptions_md":"Preserve the 32 literal ASCII-byte domain, standard IV, all 64 steps, exact padding and first-mismatch scoring. Do not decode the candidate as 16 input bytes or import the source's 52-byte/random-CV distribution. No global self-match impossibility or generic search lower bound is inferred. The source is unscoped; [] grants no automatic transfer.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Provisional relevance only. Return #4366, Claim/Findings/Limits, and review #2271 address an all-zeros output-prediction proposal using the all-msb CV characteristic. The reviewed exact step conditions and h0 cancellation mean the paired path survivor supplies no additional first-word value. Historical arm C records 138 path60 survivors among 137438953472 conditioned pairs, all 138 with equal h0, and 29 path63 survivors; S23=268443286. These are scoped compression observations, not new observations here. Review #2271 qualifies the 2^-13/2^-14 probability ceilings, rejects an automatic Q9-distribution interpretation of 138/S23, and withdraws the universal 1+2^-21 gain ceiling and independent-B assertion. Reuse this as a bounded warning for the same characteristic, with the author and reviewers credited.","assumptions_md":"The target permits arbitrary binary messages of 0..1024 bytes, but still requires standard-IV reachable states, correct whole-message length/padding, all MD5 steps and absolute leading-zero output scoring. The source supplies random CV pairs rather than legal reachable prefixes. Its fixed 416-bit length field cannot simply be retained when a prefix is added. First-word equality is not an absolute-zero probability theorem or a bound on conditional B yield. No matched end-to-end cost, legal-input speedup, broad route closure or new record is endorsed. Missing typed scope authority remains unresolved; this positive relevance is provisional and [] cannot transfer automatically.","transfer_eligible":false,"provisional_relevance":true},{"decision":"unresolved","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Return #4366, Findings/Limits, records 29 full-output equalities at path63 for the same block under different random all-msb CVs. This is a possible conceptual connection to compression pseudo-collisions, not 29 legal MD5 collision pairs. Review #2271 preserves the finite counts while withholding reachable-prefix and universal dependence claims. No distinct messages from the standard IV, full legal prefix/tail construction, total byte count or improvement against the 64+64-byte fixture is supplied. Thus relevance to an actual shorter-collision construction is unresolved.","assumptions_md":"Each member must be a distinct 0..1024-byte message, with all 128 digest bits equal under standard-IV full MD5 and correct padding. A bridge would need actual distinct reachable prefixes for the specified CV difference and a legal compatible final block/length, with all bytes and setup costs counted. The supplied 52-byte block fixes m14=416, so simply appending it to prefixes changes the required length field. Neither pseudo-collision frequency nor h0 equality establishes that bridge, a shorter collision, a lower bound or impossibility. No experiment or follow-up is nominated; the gap is recorded only. No typed scopes exist and no transfer authority is asserted.","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":13112,"input_sha256":"10ac7fef992002988f1fe04b045b911a3e9b1096f5ad05b97973e412e2d2485e","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"4a62323805d0fed4a3ad9b2eb7ad1dd5a0213609b5bdfde5e590d1195755ea55","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4366,"material_evidence":{"sha256":"32be872f9e3a9c05c9d0032c7edcafa028da84cbd5e5db1e41df6b6c23a5dba1","entries":{"return:4366":"4be96fc942f1bb080c3b7c79bd483a44d01cb0ed98298607bd378ba21a0ffc95","finding:120066":"b5a01a7ebad0e59f31b13b8c8e9c7901686ceb1565def6c0c62d328c28aba776","finding:120067":"d75c8a8a1581e2f04cf48cb5f90e56ab7686931ee9784bd455f73971452c2ea4","review:4366:1:gpt-6.1-sol":"078f63f6a57d343858f1f50b033162e4d4c38f8640a364a8daf471b3f3da87dc","artifact:4366:0c4f014711283cf507252cc3bde815ea204e95f69717d4bdd582df3d45a0031f":"0c4f014711283cf507252cc3bde815ea204e95f69717d4bdd582df3d45a0031f","artifact:4366:2276d903c56ea57e93e7069ad70b28f85cad9dcaa14bb57b5fc1430a8fa7b26c":"2276d903c56ea57e93e7069ad70b28f85cad9dcaa14bb57b5fc1430a8fa7b26c","artifact:4366:7d3639867661444b997491dca7a5ca94017346275b2048075f809320edaec198":"7d3639867661444b997491dca7a5ca94017346275b2048075f809320edaec198","artifact:4366:8e78ca41c26db96fe98f1dc5571943c0a1f80ee0ae074b43a0041e9882fbc37e":"8e78ca41c26db96fe98f1dc5571943c0a1f80ee0ae074b43a0041e9882fbc37e","artifact:4366:de74fcf16b15e8f93a66fbb4c41fe707cfd250e589b3d37d3beb59c49a7978bd":"de74fcf16b15e8f93a66fbb4c41fe707cfd250e589b3d37d3beb59c49a7978bd"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4366,"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 #4366: 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\":4366,\"report_sha256\":\"4a62323805d0fed4a3ad9b2eb7ad1dd5a0213609b5bdfde5e590d1195755ea55\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4366\":\"4be96fc942f1bb080c3b7c79bd483a44d01cb0ed98298607bd378ba21a0ffc95\",\"review:4366:1:gpt-6.1-sol\":\"078f63f6a57d343858f1f50b033162e4d4c38f8640a364a8daf471b3f3da87dc\",\"finding:120066\":\"b5a01a7ebad0e59f31b13b8c8e9c7901686ceb1565def6c0c62d328c28aba776\",\"finding:120067\":\"d75c8a8a1581e2f04cf48cb5f90e56ab7686931ee9784bd455f73971452c2ea4\",\"artifact:4366:0c4f014711283cf507252cc3bde815ea204e95f69717d4bdd582df3d45a0031f\":\"0c4f014711283cf507252cc3bde815ea204e95f69717d4bdd582df3d45a0031f\",\"artifact:4366:2276d903c56ea57e93e7069ad70b28f85cad9dcaa14bb57b5fc1430a8fa7b26c\":\"2276d903c56ea57e93e7069ad70b28f85cad9dcaa14bb57b5fc1430a8fa7b26c\",\"artifact:4366:7d3639867661444b997491dca7a5ca94017346275b2048075f809320edaec198\":\"7d3639867661444b997491dca7a5ca94017346275b2048075f809320edaec198\",\"artifact:4366:8e78ca41c26db96fe98f1dc5571943c0a1f80ee0ae074b43a0041e9882fbc37e\":\"8e78ca41c26db96fe98f1dc5571943c0a1f80ee0ae074b43a0041e9882fbc37e\",\"artifact:4366:de74fcf16b15e8f93a66fbb4c41fe707cfd250e589b3d37d3beb59c49a7978bd\":\"de74fcf16b15e8f93a66fbb4c41fe707cfd250e589b3d37d3beb59c49a7978bd\"},\"sha256\":\"32be872f9e3a9c05c9d0032c7edcafa028da84cbd5e5db1e41df6b6c23a5dba1\"},\"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:4366,input_sha256:\"10ac7fef992002988f1fe04b045b911a3e9b1096f5ad05b97973e412e2d2485e\",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/6554/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"7d4478889e1c319dfd2505c7dd53deec47134a2dbae8d30b09d58aaedad96584","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}