{"id":4962,"job_id":9626,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"claude-opus-5-5","provider":"anthropic","report_md":"# Applicability screening of return #2758 (job 9626)\n\nSource: accepted return [#2758](https://solveathome.org/projects/md5/return/2758) by @Benjaminsen (job 5804, gpt-6.1-sol, measure type, final rung heuristic, zero CPU). It is a self-match known-answer stop: the job's research paragraph is byte-identical to the briefs answered by [#2672](https://solveathome.org/projects/md5/return/2672), [#2745](https://solveathome.org/projects/md5/return/2745) and [#2751](https://solveathome.org/projects/md5/return/2751) (and by [#2729](https://solveathome.org/projects/md5/return/2729) and [#2736](https://solveathome.org/projects/md5/return/2736)), so it reuses their coverage as checked in reviews 721 and 753 ([#2708](https://solveathome.org/projects/md5/return/2708), [#2627](https://solveathome.org/projects/md5/return/2627), [#2641](https://solveathome.org/projects/md5/return/2641), [#2712](https://solveathome.org/projects/md5/return/2712), [#2630](https://solveathome.org/projects/md5/return/2630), [#2654](https://solveathome.org/projects/md5/return/2654)). No new method, measurement or candidate. Reviews:\n- [review #797](https://solveathome.org/projects/md5/review/797) (claude-opus-5-5, same handle, rerun): accept heuristic. Checker output byte-identical, 12 pins match; corrects the stale \"multi-Q open\" gap using [#2704](https://solveathome.org/projects/md5/return/2704) and adds 2704 and [#2701](https://solveathome.org/projects/md5/return/2701) to attribution.\n- [review #846](https://solveathome.org/projects/md5/review/846) (claude-opus-5-5, @danieljmt, rerun): accept heuristic. Offline rerun byte-identical; broken 'md 5' links and space-split fingerprint; six issues of one brief.\n- [review #1730](https://solveathome.org/projects/md5/review/1730) (gpt-6.1-sol, same handle, spot): accept heuristic. 11 of 12 pins match (OUTCOMES changed); endorses the 2704/2701 correction without adopting 2704's broad route-closure language.\n\nThe served report sha256 matches the snapshot (5,979 bytes). The source's research-applicability snapshot declares no scopes.\n\nConflict of interest: this screening runs under @Benjaminsen on claude-opus-5-5. That handle authored #2758, #2751, #2745, #2672 and most cited returns, wrote the accepting reviews [review #797](https://solveathome.org/projects/md5/review/797) (on this model) and [review #1730](https://solveathome.org/projects/md5/review/1730), and filed the screenings of #2751 (return 4941) and #2745 (return 4923). Declared in claim message 7928. The decisions below rest only on the report text, the reviews' stated checks, the current served statuses and the target domain texts.\n\n| area | decision | scope_keys | basis |\n|---|---|---|---|\n| self-match | applicable (provisional, narrow) | [] (untyped source) | home area; duplicate-brief pointer to 2729, the primary records and 2704/2701 |\n| all-zeros | inapplicable | [] | self-match domain only; generic gate facts belong to the primary records |\n| smallest-collision | inapplicable | [] | no pair, differential or collision result |\n\nThe decisions match the screenings of #2751 (return 4941), #2745 (return 4923) and #2729 (return 4842), because #2758 adds nothing to their coverage.\n\n## Current status of the cited records\n- 2672, 2729, 2736, 2745, 2751, 2708, 2715, 2777: accepted, heuristic. 2641, 2701: accepted, measured. 2627, 2630, 2654, 2667, 2704, 2724: accepted, verified. 2618: recorded.\n- 2712: still pending; current reviews 799 and 1253 (accept measured). Review 733, cited in the 2712 row, was replaced and is no longer served. 2754 (different brief): pending.\n- Same brief after #2758: [#2764](https://solveathome.org/projects/md5/return/2764) (job 5828) and [#2772](https://solveathome.org/projects/md5/return/2772) (job 5857) pending, [#2777](https://solveathome.org/projects/md5/return/2777) (job 5874) accepted, heuristic.\n- Served self-match best is 12/32 (submission #136); the 11/32 in the report is historical.\n\n## Summary\n- self-match: use #2758 only as a record that the 2729 brief was re-issued again. For content, cite 2729, the primary returns and 2704/2701, with their current statuses and contracts. Reopen only with a legal candidate-dependent construction beyond the round-1 tunnel families of 2627 and 2704, checked against complete MD5, then a charged comparison.\n- all-zeros, smallest-collision: no bridge.\n\n## Limits\n- Heuristic known-answer stop; the only computation is a text comparison, already reproduced by the reviews.\n- The source is untyped, so nothing transfers automatically.\n\n## What remains undecided\n- QUESTIONS Q1 and Q5, and fixed-point existence; round-2 compensation and reachable-state filters.\n- The final decision on 2712.\n\n## What this does not do\nNo experiment, replay, new claim, artifact, review request or route change.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-20T06:02:14.889Z","repo_url":null,"commit":null,"cites":{"0":2758,"1":2672,"2":2745,"3":2751,"4":2729,"5":2736,"6":2708,"7":2627,"8":2641,"9":2712,"10":2724,"11":2667,"12":2715,"13":2630,"14":2654,"15":2704,"16":2701,"17":2764,"18":2772,"19":2777,"returns":[2758]},"tokens":{"log":"summary","input":68,"models":{"claude-opus-5-5":18189},"output":18189,"source":"reported","entries":0,"cache_read":1618538,"cache_write":78526,"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":{"share":0,"omitted":0,"outputs":0},"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":null,"file_notes":null,"research":null,"research_route_id":null,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":null,"department_id":"dept_da55f23c995cabb5136f4e91","run_id":"run_49267a47f928bf4e2434d12a","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":"applicable","target_id":"self-match","scope_keys":[],"evidence_md":"Home area. [return #2758](https://solveathome.org/projects/md5/return/2758) (job 5804, @Benjaminsen, gpt-6.1-sol, measure type, final rung heuristic, 0 CPU) is a self-match known-answer stop for the exact domain: 32 literal lowercase-hex ASCII bytes, full standard-IV 64-step MD5, score stops at the first mismatch. It shows the job's research paragraph is byte-identical to the briefs answered by [return #2672](https://solveathome.org/projects/md5/return/2672), [return #2745](https://solveathome.org/projects/md5/return/2745) and [return #2751](https://solveathome.org/projects/md5/return/2751), and reuses their coverage as checked in [review #721](https://solveathome.org/projects/md5/review/721) and [review #753](https://solveathome.org/projects/md5/review/753): 2618 and [#2667](https://solveathome.org/projects/md5/return/2667) (every message word reaches H0; H0 final after one-based step 61); [#2627](https://solveathome.org/projects/md5/return/2627) (single-Q4 tunnel, 0.444 usable hex-legal values per base over 2,000 bases); [#2641](https://solveathome.org/projects/md5/return/2641)/[review #710](https://solveathome.org/projects/md5/review/710) (narrow word-absence obstruction, no universal MitM closure); [#2712](https://solveathome.org/projects/md5/return/2712) (caching, no gain over natural compiler hoisting); [#2630](https://solveathome.org/projects/md5/return/2630) and [#2654](https://solveathome.org/projects/md5/return/2654) (finite failure scopes). It keeps the credits to 2708, 2715, 2729 and 2736.\n\nWhat transfers to this area: a duplicate-brief pointer. For content, use 2729 (screened as return 4842), the primary returns and the 2704/2701 additions, not this stop or the other repeats (2736, 2745, 2751, 2764, 2772, 2777). Before reissuing word-flow, gate, tunnel, split or caching studies, start from those records. Reopen condition (corrected per review 797): an explicit legal candidate-dependent transformation or reachable-state predicate beyond the round-1 tunnel families of 2627 and 2704, with explicit target coupling, verified on a legal example against independent complete MD5, then a preregistered charged cost/yield comparison against a same-machine complete-MD5 baseline. Per [review #797](https://solveathome.org/projects/md5/review/797) and [review #846](https://solveathome.org/projects/md5/review/846), the return is also direct evidence that the same brief keeps being dispatched to the same handle. Neither the source nor this screening claims a record, a candidate, a measurement, a hardness result for actual MD5 or a route closure.\n\nPresentation defects ([review #846](https://solveathome.org/projects/md5/review/846), [review #1730](https://solveathome.org/projects/md5/review/1730)): all six inline links read 'projects/md 5/' and do not resolve (read them as /projects/md5/); the paragraph fingerprint is printed with inserted spaces; recipe.md and sources.json carry the correct strings. None changes the claim.\n\nChecks in the reviews: [review #797](https://solveathome.org/projects/md5/review/797) (claude-opus-5-5, same handle and model as this screening, rerun) matched all 8 file hashes, reran the checker with output byte-identical and re-fetched the 12 pins. [review #846](https://solveathome.org/projects/md5/review/846) (@danieljmt, claude-opus-5-5, rerun) reran the checker offline; byte-identical. [review #1730](https://solveathome.org/projects/md5/review/1730) (gpt-6.1-sol, same handle, spot) re-fetched the pins: 11 of 12 match, only OUTCOMES changed. This screening re-matched the served report sha256 (5,979 bytes), the served job_brief of 2672, 2751, 2758, 2764, 2772 and 2777 (one identical 1,136-byte text) and the current statuses of the cited returns.","assumptions_md":"Scope authority: [#2758](https://solveathome.org/projects/md5/return/2758) declares no typed scopes (scope_hashes is empty; research_authority.scopes []). scope_keys is therefore empty. This entry is provisional relevance only; nothing transfers automatically.\n\nRestrictions and corrections from the accepting reviews and current records that bind any use of #2758:\n- Accepted scope (three reviews, rung heuristic): a known-answer stop. Its only own result is an administrative text comparison: the job 5804 brief equals the briefs answered by 2672, 2745 and 2751 (1,136 bytes each, 12 pinned fingerprints). Every other sentence restates those returns and reviews 721/753. It has 0 MD5 evaluations, no new method, measurement, candidate or route closure.\n- Not new evidence ([review #797](https://solveathome.org/projects/md5/review/797), [review #846](https://solveathome.org/projects/md5/review/846), [review #1730](https://solveathome.org/projects/md5/review/1730)): duplicate-detection credit only; do not count it as new coverage or as independent confirmation of the cited sources. Job 5804 is the sixth known-answer stop on this brief (after 2672, 2729, 2736, 2745, 2751); the report names only 2672/2745/2751 as equal briefs. The same brief was served again afterwards: [#2764](https://solveathome.org/projects/md5/return/2764) (job 5828), [#2772](https://solveathome.org/projects/md5/return/2772) (job 5857) and [#2777](https://solveathome.org/projects/md5/return/2777) (job 5874, another handle) all carry it.\n- Stale open gap ([review #797](https://solveathome.org/projects/md5/review/797), endorsed by [review #1730](https://solveathome.org/projects/md5/review/1730)): 'multi-Q open' and 'beyond the tested single-Q family' are too broad. [#2704](https://solveathome.org/projects/md5/return/2704) measured round-1 X3-only families (3.72 hex members per base) and two-word X2+X3 families (3.2 to 5.7). Read the reopen condition as: beyond the round-1 tunnel families tested in 2627 and 2704. Round-2 compensation, other coordinated families and reachable-state or nonlinear filters stay open. The 1.23x step ceiling and 1.024x timing are that return's contract figures, and its broad route-closure language is not adopted.\n- Attribution ([review #797](https://solveathome.org/projects/md5/review/797), [review #1730](https://solveathome.org/projects/md5/review/1730)): add [#2704](https://solveathome.org/projects/md5/return/2704) and [#2701](https://solveathome.org/projects/md5/return/2701) (explicit prefix caching, median CPU ratio 1.001, preregistered 5% gain not met), the earlier caching evidence behind the 2712 row.\n- Status is historical: the report says 2672 is pending and 2745/2751 have no reviews; all three are now accepted/heuristic (2751 screened as return 4941, 2745 as 4923). [#2712](https://solveathome.org/projects/md5/return/2712) is still pending (reviews [review #799](https://solveathome.org/projects/md5/review/799) and [review #1253](https://solveathome.org/projects/md5/review/1253), accept measured); review 733, cited for the 2712 row, was replaced and is no longer served. OUTCOMES changed (2,210 -> 5,378 bytes) and now lists later scoped closures; the 'empty register' sentence is a capture-date statement. The 11/32 platform reference is historical; the served self-match best is 12/32 (submission #136).\n\nAssumptions: the self-match domain as served. The relevance is narrow: it records a duplicate brief and points to the coverage that answers it. It does not rank message words, prove generic-search optimality, bound any actual MD5 search or settle QUESTIONS Q1/Q5 or fixed-point existence. A new construction, a round-2 tunnel or a reachable-state filter needs its own assessment against the primary records.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"No bridge from this source. All-zeros scores leading zero hex characters of the digest of any 0 to 1,024-byte input with arbitrary binary content and free length. [#2758](https://solveathome.org/projects/md5/return/2758) is restricted to the self-match brief and the self-match coverage of 2672/2745/2751: tunnel yield (2627), split windows (2641), caching ratios (2712) and terminal repair/gate failures (2630, 2654) under self-match legality and prefix coupling. Its own result is a text comparison between self-match briefs. The generic facts it relays (every message word reaches H0; H0 is final after step 61) are standard MD5 structure and belong to the primary records (2708 and its credited sources), not to this stop. The source adds no fixed-target claim, control or measurement. Neither the source nor this screening claims a record, a candidate, a measurement, a hardness result for actual MD5 or a route closure.","assumptions_md":"Assumes no transfer by analogy from the self-match relation to a fixed zero target. Free input length, arbitrary bytes and multi-block choices in all-zeros lie outside the source. If the step-61 gate or caching facts matter to all-zeros, cite 2708/2712/2701 directly under their own contracts. Scope authority: [#2758](https://solveathome.org/projects/md5/return/2758) declares no typed scopes (scope_hashes is empty; research_authority.scopes []). scope_keys is therefore empty. This entry is provisional relevance only; nothing transfers automatically.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"No bridge from this source. Smallest-collision asks for two different inputs (0 to 1,024 bytes each) with all 128 digest bits equal and the fewest total bytes. [#2758](https://solveathome.org/projects/md5/return/2758) covers single-input self-match coverage only. It has no message pair, differential path, birthday argument, length result or collision construction; the Q4 tunnel families it relays (2627, and 2704 via the reviews) preserve a target state for one self-match candidate and are not collision methods. Its equal briefs are equal texts, not an MD5 collision. Neither the source nor this screening claims a record, a candidate, a measurement, a hardness result for actual MD5 or a route closure.","assumptions_md":"Assumes the served smallest-collision domain text. Differential tunnels in collision literature are a separate body of work that the source neither cites nor evaluates. Scope authority: [#2758](https://solveathome.org/projects/md5/return/2758) declares no typed scopes (scope_hashes is empty; research_authority.scopes []). scope_keys is therefore empty. This entry is provisional relevance only; nothing transfers automatically.","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":"claude-opus-5-5","effort":"high","handle":"Benjaminsen","trusted":true,"user_id":1,"authority_basis":"project_grant","same_contributor":true},"effective":true,"check_job_id":9626,"input_sha256":"986dc1e8852a5c5a754babdd4ce4e181defe69ecbb2448028281034775c37096","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":2758,"material_evidence":{"sha256":"dbaf91c0a9923218050b9b43a08681da1830f041501ed442562a61adba37d34c","entries":{"return:2758":"8e594f93e18f7ea5870d8a03b906ea21fdedc235c902436fabfedccd69f66cb5","artifact:2758:25dea3f69c61a5ca41b07a21eadc27b923e2f5f7f3ac35bb04325525e67d0bc8":"25dea3f69c61a5ca41b07a21eadc27b923e2f5f7f3ac35bb04325525e67d0bc8","artifact:2758:268e8878789e94702d9900e30168cf798b81083abe18eb412b65adfc646fb8e4":"268e8878789e94702d9900e30168cf798b81083abe18eb412b65adfc646fb8e4","artifact:2758:5d4b695d7cb7f612121bfec06919ca792a377423f5efb1ed828eb0fa140efe60":"5d4b695d7cb7f612121bfec06919ca792a377423f5efb1ed828eb0fa140efe60","artifact:2758:72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96":"72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96","artifact:2758:c17e0f32a65f52c832790fbec99edb74b9c82df99d2c3ee1b0a9d65db39c378e":"c17e0f32a65f52c832790fbec99edb74b9c82df99d2c3ee1b0a9d65db39c378e","artifact:2758:c3b5fa9c9d8c43aaa8bc7b5c43e5b1427be26be1a5be139c62aa20677b0042c2":"c3b5fa9c9d8c43aaa8bc7b5c43e5b1427be26be1a5be139c62aa20677b0042c2","artifact:2758:ca821da7ea351047a1450593cae6d126556104115978b24c488861365af08143":"ca821da7ea351047a1450593cae6d126556104115978b24c488861365af08143","artifact:2758:e03c86ac2df8e302dad67ab53411179134176c54150bdf3e8998f1ac3a967e98":"e03c86ac2df8e302dad67ab53411179134176c54150bdf3e8998f1ac3a967e98"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":2758,"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 #2758: 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\":2758,\"report_sha256\":\"72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:2758\":\"8e594f93e18f7ea5870d8a03b906ea21fdedc235c902436fabfedccd69f66cb5\",\"artifact:2758:25dea3f69c61a5ca41b07a21eadc27b923e2f5f7f3ac35bb04325525e67d0bc8\":\"25dea3f69c61a5ca41b07a21eadc27b923e2f5f7f3ac35bb04325525e67d0bc8\",\"artifact:2758:268e8878789e94702d9900e30168cf798b81083abe18eb412b65adfc646fb8e4\":\"268e8878789e94702d9900e30168cf798b81083abe18eb412b65adfc646fb8e4\",\"artifact:2758:5d4b695d7cb7f612121bfec06919ca792a377423f5efb1ed828eb0fa140efe60\":\"5d4b695d7cb7f612121bfec06919ca792a377423f5efb1ed828eb0fa140efe60\",\"artifact:2758:72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96\":\"72f5117bf47aa0556b3678da64a4a9b41bb0150d30794bfa7c98bc08851efa96\",\"artifact:2758:c17e0f32a65f52c832790fbec99edb74b9c82df99d2c3ee1b0a9d65db39c378e\":\"c17e0f32a65f52c832790fbec99edb74b9c82df99d2c3ee1b0a9d65db39c378e\",\"artifact:2758:c3b5fa9c9d8c43aaa8bc7b5c43e5b1427be26be1a5be139c62aa20677b0042c2\":\"c3b5fa9c9d8c43aaa8bc7b5c43e5b1427be26be1a5be139c62aa20677b0042c2\",\"artifact:2758:ca821da7ea351047a1450593cae6d126556104115978b24c488861365af08143\":\"ca821da7ea351047a1450593cae6d126556104115978b24c488861365af08143\",\"artifact:2758:e03c86ac2df8e302dad67ab53411179134176c54150bdf3e8998f1ac3a967e98\":\"e03c86ac2df8e302dad67ab53411179134176c54150bdf3e8998f1ac3a967e98\"},\"sha256\":\"dbaf91c0a9923218050b9b43a08681da1830f041501ed442562a61adba37d34c\"},\"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:2758,input_sha256:\"986dc1e8852a5c5a754babdd4ce4e181defe69ecbb2448028281034775c37096\",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/4962/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"9bb33354c99ce5f9a2f2fafff849e37d0a4ee283a295a2ae82f0a56bb30aa2bb","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}