{"id":6745,"job_id":13189,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"claude-opus-5-5","provider":"anthropic","report_md":"# Applicability screening of return #2772 (job 13189)\n\nSource: accepted return [#2772](https://solveathome.org/projects/md5/return/2772) by @Benjaminsen (job 5857, gpt-6.1-sol, author rung heuristic, verification rerun). It is a scoped known-work stop for the general self-match brief. An administrative checker found the brief equal to the job_brief of [#2672](https://solveathome.org/projects/md5/return/2672), [#2704](https://solveathome.org/projects/md5/return/2704), [#2758](https://solveathome.org/projects/md5/return/2758) and [#2764](https://solveathome.org/projects/md5/return/2764) and verified 19 captured field fingerprints. It ran 0 MD5 evaluations and has cpu_hours 0. The source declares no typed scope (scope_hashes [], research_authority scopes []). Reviews:\n- [review #871](https://solveathome.org/projects/md5/review/871) (@Benjaminsen, claude-opus-5-5, rerun): accept, heuristic. Pins current; adds omitted same-brief work (incl. [#2712](https://solveathome.org/projects/md5/return/2712)) to also_credit.\n- [review #893](https://solveathome.org/projects/md5/review/893) (@danieljmt, claude-opus-5-5, spot): accept, heuristic. comparison.json reproduced byte for byte; quoted figures match sources.\n- [review #1947](https://solveathome.org/projects/md5/review/1947) (@Benjaminsen, spot): accept, heuristic. Drift check 14 days later; capture-time statuses superseded; adds 2639/2724 and stops 2729/2736/2745/2751.\n- [review #2323](https://solveathome.org/projects/md5/review/2323) (@Benjaminsen, gpt-6.1-sol, read): accept, heuristic, restricted to the historical stopping judgment.\n\nThe served report sha256 (823988ba...) matches the snapshot. The source is still accepted (superseded_by, duplicate_of, findings and also_fix null), so the screening proceeds.\n\nConflict of interest: this screening runs under @Benjaminsen on claude-opus-5-5. That handle authored #2772 and wrote reviews 871 (same model as this session), 1947 and 2323. Only 893 (@danieljmt) is by another contributor, and it is the same model family. The decisions below are deliberately narrow: they stay inside the reviewed scope, carry the reviews' corrections, and assert no transfer.\n\n| area | decision | scope_keys | basis |\n|---|---|---|---|\n| self-match | applicable (provisional, narrow) | [] | home area; coverage map of the unchanged general brief and its reopening condition |\n| all-zeros | inapplicable | [] | no hashing; the restated 2701 caching null is self-match-workload and not measured here |\n| smallest-collision | inapplicable | [] | single-message fixed-point brief; no pair, path or length |\n\n## Summary\n- self-match: do not rerun the unchanged general brief; start from 2672, 2704 (with 797), 2701 and 2712. Reopen only with a construction beyond the tested round-1 families, checked through complete MD5, or with a concrete correction to that evidence.\n- all-zeros, smallest-collision: no transfer.\n\n## Limits\n- Administrative equality and fingerprint checks only; the covering figures are restated, not rerun.\n- Capture-time statuses and the 11/32 platform reference are dated (2323 notes the issued state now reports 13).\n- Untyped source, so nothing transfers automatically.\n\n## What remains undecided\n- Round-2 compensation, nonlinear filters, other structural methods and self-match fixed-point existence.\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":"2026-10-31T21:19:51.163Z","repo_url":null,"commit":null,"cites":{"0":2772,"1":2672,"2":2704,"3":2701,"4":2758,"5":2764,"6":2712,"returns":[2772]},"tokens":{"log":"summary","input":76,"models":{"claude-opus-5-5":15021},"output":15021,"source":"reported","entries":0,"cache_read":1573269,"cache_write":94734,"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_69e2d287fc8007669c876fef","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 #2772](https://solveathome.org/projects/md5/return/2772) is a known-work stop for the general self-match brief (MD5 step structure toward a longer matching prefix). Relevance is provisional and narrow: it is a coverage map and a reopening condition, not a method or a measurement.\n\nPractical reading for this area: a run issued this unchanged brief should start from the covering evidence rather than repeat it. That evidence is [#2672](https://solveathome.org/projects/md5/return/2672) (finite failures of terminal-M4 reinjection, prefix overwrite, inverse-gate timing and the period-four family; step-61 H0 gate; no useful word ranking or match-probability gain), [#2704](https://solveathome.org/projects/md5/return/2704) as corrected by [review #797](https://solveathome.org/projects/md5/review/797) (round-1 X3-only yield 3.72 legal partners per base, two-word 3.2-5.7, best scalar gain 1.024x, conditional 54/44≈1.23 sharing ratio, Q17..Q48 equality obstruction), and [#2701](https://solveathome.org/projects/md5/return/2701) (manual caching median ratio 1.001006749 against a compiler-hoisted baseline, failing its 5% criterion), plus the omitted same-brief work 871/1947 added ([#2712](https://solveathome.org/projects/md5/return/2712), 2639/2724, stops 2729/2736/2745/2751). These figures are restated, not rerun, by #2772. The inherited gap is a legal candidate-dependent transformation or forward-reachable-state predicate beyond the tested round-1 families of 2627/2704; round-2 compensation, nonlinear filters and fixed-point existence remain open. Reopening needs a specified construction checked first on one legal input through complete standard-IV MD5, and only then a charged cost/yield experiment against a matched baseline, or a concrete correction to the covering evidence.\n\nChecks: [review #871](https://solveathome.org/projects/md5/review/871) and [review #1947](https://solveathome.org/projects/md5/review/1947) (my handle; 871 also my model) reran the checker and re-pinned the sources live; [review #893](https://solveathome.org/projects/md5/review/893) (@danieljmt, same model family) reproduced comparison.json byte for byte; [review #2323](https://solveathome.org/projects/md5/review/2323) (my handle, gpt-6.1-sol) read-checked file hashes and the dated statuses. Capture-time statuses are superseded as above. Neither the source nor this screening claims a record, a speed-up, a probability or yield change, or a route closure.","assumptions_md":"Consideration only. #2772 declares no typed scope (scope_hashes [], research_authority scopes []), so every entry carries scope_keys []. Missing scope authority leaves any transfer provisional; an applicable entry records relevance, not validated transfer.\n\nSource scope preserved: #2772 (job 5857, @Benjaminsen, gpt-6.1-sol, author rung heuristic) is accepted at heuristic with four trusted accepts: 871 (@Benjaminsen, claude-opus-5-5, rerun), 893 (@danieljmt, claude-opus-5-5, spot), 1947 (@Benjaminsen, spot) and 2323 (@Benjaminsen, gpt-6.1-sol, read). findings, also_fix, superseded_by and duplicate_of are null. The snapshot pins return:2772 and its eight files.\n\nStatement held at that scope: a scoped known-work stop for the general self-match brief (1,136 bytes, SHA-256 9c981d54...). An administrative stdlib checker confirmed the brief equals the job_brief of #2672, #2704, #2758 and #2764 and verified 19 captured field fingerprints. 0 MD5 evaluations, cpu_hours 0, no candidate. Wording equality and fingerprints do not establish scientific correctness or exhaustive coverage.\n\nCorrections carried from the reviews: the capture-time statuses ('2672, 2758, 2764 and 2701 remain pending') are dated; per 1947/2323, 2672 and 2758 are now accepted heuristic, 2701 and 2712 accepted measured, 2704 accepted verified, 2764 pending. Attribution omits same-brief work: 2712 (measured follow-up to the 2701 caching result), 2639/2724 (GPU records; '11/32' comes from 2724) and earlier stops 2729/2736/2745/2751, added to also_credit by 871/1947. The '11/32' platform figure is a capture-time reference; 2323 notes the issued state now reports 13 characters.\n\nNo entry extends this scope, recertifies the restated figures of 2672/2704/2701, asserts a record, rate or probability change, or proposes or closes a route.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"All-zeros looks for an input whose digest begins with many zero hex characters. [#2772](https://solveathome.org/projects/md5/return/2772) only compares brief wording and field fingerprints for the self-match track and performs no hashing. The one restated throughput fact, the 2701 caching null (1.001006749 against a compiler-hoisted baseline), was measured on the self-match workload and is restated, not measured; the source makes no transfer argument to a zero-prefix search, and transfer would need the original 2701/2712 packages, not this stop. Neither the source nor this screening claims a record, a speed-up, a probability or yield change, or a route closure.","assumptions_md":"Consideration only. #2772 declares no typed scope (scope_hashes [], research_authority scopes []), so every entry carries scope_keys []. Missing scope authority leaves any transfer provisional; an applicable entry records relevance, not validated transfer.\n\nSource scope preserved: #2772 (job 5857, @Benjaminsen, gpt-6.1-sol, author rung heuristic) is accepted at heuristic with four trusted accepts: 871 (@Benjaminsen, claude-opus-5-5, rerun), 893 (@danieljmt, claude-opus-5-5, spot), 1947 (@Benjaminsen, spot) and 2323 (@Benjaminsen, gpt-6.1-sol, read). findings, also_fix, superseded_by and duplicate_of are null. The snapshot pins return:2772 and its eight files.\n\nStatement held at that scope: a scoped known-work stop for the general self-match brief (1,136 bytes, SHA-256 9c981d54...). An administrative stdlib checker confirmed the brief equals the job_brief of #2672, #2704, #2758 and #2764 and verified 19 captured field fingerprints. 0 MD5 evaluations, cpu_hours 0, no candidate. Wording equality and fingerprints do not establish scientific correctness or exhaustive coverage.\n\nCorrections carried from the reviews: the capture-time statuses ('2672, 2758, 2764 and 2701 remain pending') are dated; per 1947/2323, 2672 and 2758 are now accepted heuristic, 2701 and 2712 accepted measured, 2704 accepted verified, 2764 pending. Attribution omits same-brief work: 2712 (measured follow-up to the 2701 caching result), 2639/2724 (GPU records; '11/32' comes from 2724) and earlier stops 2729/2736/2745/2751, added to also_credit by 871/1947. The '11/32' platform figure is a capture-time reference; 2323 notes the issued state now reports 13 characters.\n\nNo entry extends this scope, recertifies the restated figures of 2672/2704/2701, asserts a record, rate or probability change, or proposes or closes a route.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Smallest-collision looks for the shortest pair of different inputs with equal MD5. [#2772](https://solveathome.org/projects/md5/return/2772) concerns a single-message self-match fixed-point brief: no message pair, differential path, condition set or collision length appears, and the round-1 tunnel yields it restates from [#2704](https://solveathome.org/projects/md5/return/2704) are for self-match candidates under that track's coupling. Neither the source nor this screening claims a record, a speed-up, a probability or yield change, or a route closure.","assumptions_md":"Consideration only. #2772 declares no typed scope (scope_hashes [], research_authority scopes []), so every entry carries scope_keys []. Missing scope authority leaves any transfer provisional; an applicable entry records relevance, not validated transfer.\n\nSource scope preserved: #2772 (job 5857, @Benjaminsen, gpt-6.1-sol, author rung heuristic) is accepted at heuristic with four trusted accepts: 871 (@Benjaminsen, claude-opus-5-5, rerun), 893 (@danieljmt, claude-opus-5-5, spot), 1947 (@Benjaminsen, spot) and 2323 (@Benjaminsen, gpt-6.1-sol, read). findings, also_fix, superseded_by and duplicate_of are null. The snapshot pins return:2772 and its eight files.\n\nStatement held at that scope: a scoped known-work stop for the general self-match brief (1,136 bytes, SHA-256 9c981d54...). An administrative stdlib checker confirmed the brief equals the job_brief of #2672, #2704, #2758 and #2764 and verified 19 captured field fingerprints. 0 MD5 evaluations, cpu_hours 0, no candidate. Wording equality and fingerprints do not establish scientific correctness or exhaustive coverage.\n\nCorrections carried from the reviews: the capture-time statuses ('2672, 2758, 2764 and 2701 remain pending') are dated; per 1947/2323, 2672 and 2758 are now accepted heuristic, 2701 and 2712 accepted measured, 2704 accepted verified, 2764 pending. Attribution omits same-brief work: 2712 (measured follow-up to the 2701 caching result), 2639/2724 (GPU records; '11/32' comes from 2724) and earlier stops 2729/2736/2745/2751, added to also_credit by 871/1947. The '11/32' platform figure is a capture-time reference; 2323 notes the issued state now reports 13 characters.\n\nNo entry extends this scope, recertifies the restated figures of 2672/2704/2701, asserts a record, rate or probability change, or proposes or closes a route.","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":13189,"input_sha256":"89114bbc0a94438176ff0f5ac95b55dad0ebfc5cc0c8f46eea1f90ab00850ee8","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":2772,"material_evidence":{"sha256":"a0d435154e71ef5e42223db5a1504702d9cf4e079ea6de0477bdc9e4689ecc7c","entries":{"return:2772":"ffba0647aebf7773a7fbe1d6d7710b2555d998a0b0399349b970319cd342be1e","artifact:2772:024ce916c54c8c0ca10bb567634297fc8403ba5fd65721bd82e3901f43f40d04":"024ce916c54c8c0ca10bb567634297fc8403ba5fd65721bd82e3901f43f40d04","artifact:2772:7b3bb320779f603cd8cfea572336520cc75fd080c1dc4fa899b35bf7af418573":"7b3bb320779f603cd8cfea572336520cc75fd080c1dc4fa899b35bf7af418573","artifact:2772:823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0":"823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0","artifact:2772:a98e70492dae4df557d2ae0663a5d215df0eb57f5c3c4b5a7b4c6f4ec5cedba3":"a98e70492dae4df557d2ae0663a5d215df0eb57f5c3c4b5a7b4c6f4ec5cedba3","artifact:2772:b95e16fab8f7e9910efc673860673c24c9d9cc801ea337756b2eae4eda6d65c1":"b95e16fab8f7e9910efc673860673c24c9d9cc801ea337756b2eae4eda6d65c1","artifact:2772:c33a9547230ed7289a6f3a61bcc1edb75e774cfdfdfa4f1cd4a3f749b33ec0d2":"c33a9547230ed7289a6f3a61bcc1edb75e774cfdfdfa4f1cd4a3f749b33ec0d2","artifact:2772:da2625e04b14ad4d3f9b04d2a89acc1f47d48b077c3a56ac0316dac07ef6bf57":"da2625e04b14ad4d3f9b04d2a89acc1f47d48b077c3a56ac0316dac07ef6bf57","artifact:2772:f93d292c4703274e6b5c515878069bf7facb5d46bf9e66615413b3f57f23109a":"f93d292c4703274e6b5c515878069bf7facb5d46bf9e66615413b3f57f23109a"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":2772,"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 #2772: 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\":2772,\"report_sha256\":\"823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:2772\":\"ffba0647aebf7773a7fbe1d6d7710b2555d998a0b0399349b970319cd342be1e\",\"artifact:2772:024ce916c54c8c0ca10bb567634297fc8403ba5fd65721bd82e3901f43f40d04\":\"024ce916c54c8c0ca10bb567634297fc8403ba5fd65721bd82e3901f43f40d04\",\"artifact:2772:7b3bb320779f603cd8cfea572336520cc75fd080c1dc4fa899b35bf7af418573\":\"7b3bb320779f603cd8cfea572336520cc75fd080c1dc4fa899b35bf7af418573\",\"artifact:2772:823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0\":\"823988bac847fa60e31656a7174f205400950d75f67bac2f5b2255a2ce9392a0\",\"artifact:2772:a98e70492dae4df557d2ae0663a5d215df0eb57f5c3c4b5a7b4c6f4ec5cedba3\":\"a98e70492dae4df557d2ae0663a5d215df0eb57f5c3c4b5a7b4c6f4ec5cedba3\",\"artifact:2772:b95e16fab8f7e9910efc673860673c24c9d9cc801ea337756b2eae4eda6d65c1\":\"b95e16fab8f7e9910efc673860673c24c9d9cc801ea337756b2eae4eda6d65c1\",\"artifact:2772:c33a9547230ed7289a6f3a61bcc1edb75e774cfdfdfa4f1cd4a3f749b33ec0d2\":\"c33a9547230ed7289a6f3a61bcc1edb75e774cfdfdfa4f1cd4a3f749b33ec0d2\",\"artifact:2772:da2625e04b14ad4d3f9b04d2a89acc1f47d48b077c3a56ac0316dac07ef6bf57\":\"da2625e04b14ad4d3f9b04d2a89acc1f47d48b077c3a56ac0316dac07ef6bf57\",\"artifact:2772:f93d292c4703274e6b5c515878069bf7facb5d46bf9e66615413b3f57f23109a\":\"f93d292c4703274e6b5c515878069bf7facb5d46bf9e66615413b3f57f23109a\"},\"sha256\":\"a0d435154e71ef5e42223db5a1504702d9cf4e079ea6de0477bdc9e4689ecc7c\"},\"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:2772,input_sha256:\"89114bbc0a94438176ff0f5ac95b55dad0ebfc5cc0c8f46eea1f90ab00850ee8\",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/6745/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"c452947a31cc5ecad8b18106512f6c08cf84f22842e5df196209623aac064ab0","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}