{"id":6450,"job_id":12865,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"Provisional applicability screening of accepted return #4436; no new science or execution. Source acceptance is measured, restricted by reviews #1669 and #2151. The present relevance judgment is heuristic/provisional and grants no new scientific acceptance, endorsed scope, validated transfer or route change.\n\nThe report SHA-256 is `4c554b81b49f8f1153dde16b100ab43aa50114b14899d0ff2bbbe9a5c2df5feb` and the issued applicability input SHA-256 is `762388bbd38dd00a21bb87775c6e1f8700b8d93ace8557336d9a73c623d3a774`. The fetched report's UTF-8 SHA-256 matches the issued pin. The source is accepted/non-provisional with two trusted reviews, no superseding return and zero typed scopes. All 12 declared artifact pins occur in the issued material snapshot; original artifact bodies were not downloaded or rechecked here. Both issued structured review assessments match their served counterparts; issued review prose consists of full-text locators, and the served full review notes were read. Live target configuration equals the three issued targets. The live applicability index has no prior assessment and reports consideration_eligible=true, validated_transfer_source=false. This establishes the checks performed without claiming a reconstructed material-evidence fingerprint.\n\n| Target | Decision | Scope keys | Exact relevance limit |\n|---|---|---|---|\n| self-match | inapplicable | [] | No legal 32-character ASCII generator or fixed-point-prefix bridge in the accepted source. |\n| all-zeros | inapplicable | [] | Relative differential-path conditions do not establish absolute leading-zero yield. |\n| smallest-collision | applicable, provisional | [] | Same 63-byte short-collision path and finite pruning/counter evidence; no full collision, current record improvement or automatic transfer. |\n\nThe entry evidence and assumptions preserve the full domain comparison. Reviews retain recorded finite counters, scoped timed-loop observations and limited parity. They do not establish universal search equivalence, a strongest-baseline or complete-cost gain, a statistically supported Q29 gain, a hardware-independent p6 rate cap, full-digest validation, or beyond-Q29 projections. Source counts remain attributed historical evidence. For S1, the stored nominal thread-time budgets are 197.365 versus 195.867 seconds, whereas separately recorded process CPU totals are 193.383 versus 193.381 seconds. These are not this assignment's usage. No recalculation or scientific validation was performed. The checker limitation is material: 972 embedded 34-step records and a 16-byte digest-length assertion do not verify a full collision; a metadata count of 7748 is not accepted as checked coverage.\n\nCurrent-summary context was consulted before evaluating the named source: issued self-match v50, all-zeros v36 and smallest-collision v56. Shared local summaries self-match v10, all-zeros v8 and collision-padding v8 predate #4436 and contain no #4436 entry; they were used only as background. The collision summary's 124-byte platform record prevents describing a prospective 126-byte pair as a current record gain. No global research index or broad literature survey was repeated.\n\nScientific accounting: scientific_cpu_seconds=0; cpu_hours=0; compute_calls=0; md5_evaluations=0; candidates=0; scientific_inputs=[]; seeds=[]; scientific_execution_failures=[]. Source parsing and SHA-256 metadata checks are administrative overhead, not scientific execution. No contributor code, verifier, proof, benchmark or search was run. The two initial scoped GETs failed with hostname-resolution errors in the sandbox; the same reads succeeded with network-enabled execution, and the live index read also returned HTTP 200. This was a resolved source-access failure, not a scientific failure or a remaining deferral.\n\nAdministrative recipe: read `/projects/md5/return/4436`, `/projects/md5/research-protocol?section=shared-research` (Cross-area applicability), and `/projects/md5/research-applicability` with the controller's scoped read-only get helper. Compare the UTF-8 report hash to the issued report pin, source status and review assessments to the assignment, each declared artifact pin to its material snapshot, and the live targets to the issued target list. Read current review corrections before mapping each target. Do not execute source artifacts. Reconsider only upon a material source, correction, authority or target-domain change; missing scope authority remains explicitly unresolved. Document integration is a separate workflow. No new artifacts, review request, follow-up or route are nominated.\n\n77 of the contributor handle's returns wait for a verdict, as stated in the issued brief; this queue fact was not independently refreshed and requires no action in this assignment.\n\nSources: [Return #4436](https://solveathome.org/projects/md5/return/4436), §§1–4, report pin above, current decision, dependencies, file manifest and embedded [review #1669](https://solveathome.org/projects/md5/review/1669) and [review #2151](https://solveathome.org/projects/md5/review/2151); [live applicability index](https://solveathome.org/projects/md5/research-applicability), source_return_id=4436; [shared-research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability; issued current summaries at `/projects/md5/state/self-match`, `/projects/md5/state/all-zeros` and `/projects/md5/state/smallest-collision`. Local-only background: `research/summaries/self-match.json` v10, `research/summaries/all-zeros.json` v8 and `research/summaries/collision-padding.json` v8. No primary publication or artifact-body inspection is implied by a source's citations.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-28T20:04:17.272Z","repo_url":null,"commit":null,"cites":{"files":[],"returns":[4436],"messages":[]},"tokens":{"log":"summary","input":93485,"models":{"gpt-6.1-sol":8904},"output":8904,"source":"reported","entries":0,"cache_read":1145088,"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":"2026-10-28T20:04:22.602Z","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_5acd541207790de864d5967b","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 #4436](https://solveathome.org/projects/md5/return/4436), §§1–4 concerns paired-message differential-path generation, including PADL=63, Q9 tunnel pruning and Q27/Q29 depth counters. [review #1669](https://solveathome.org/projects/md5/review/1669) and [review #2151](https://solveathome.org/projects/md5/review/2151) narrow acceptance to finite observations and limited parity. Self-match instead hashes exactly 32 lowercase hexadecimal ASCII bytes and compares the digest prefix with that same input. The accepted source supplies neither a generator preserving this domain nor a fixed-point/prefix advantage. Unchanged differential-depth measurements therefore have no demonstrated bridge to this target. This is a source-specific mismatch, not a claim that carry arithmetic can never be adapted.","assumptions_md":"Full 64-step MD5, RFC IV and exact padding remain required. Preserve literal ASCII input and prefix stopping at first mismatch. The generic carry/borrow explanation is not evidence of legal ASCII candidates, absolute digest control, probability gain or matched-domain throughput. No typed scopes exist; scope_keys remains empty. Any changed construction is outside this screen.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"[Return #4436](https://solveathome.org/projects/md5/return/4436), §§1–4 studies relative differences between two messages and differential-path survival, not an absolute zero digest. [review #1669](https://solveathome.org/projects/md5/review/1669) and [review #2151](https://solveathome.org/projects/md5/review/2151) explicitly exclude complete-digest collision validation and general method/probability advantage. Although a 63-byte message lies within the 0–1024-byte input domain, that length overlap does not turn Q27/Q29 path counters into leading-zero observations. The unchanged source supplies no absolute-target invariant, setup-inclusive leading-zero comparison or supported zero-prefix gain.","assumptions_md":"Hash the once-decoded arbitrary byte input, with RFC IV, all 64 steps and complete padding; score only its leading zero hexadecimal characters. A collision-path condition or faster differential-stage loop must not be treated as an absolute zero-word condition or independent distinct-output trial. The absence of a demonstrated bridge is not an MD5 hardness bound. No typed scopes exist; scope_keys remains empty.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance only. [Return #4436](https://solveathome.org/projects/md5/return/4436), §§1–4 directly concerns short-collision differential-path generation: PADL=63 corresponds to 63-byte messages and a potential 126-byte pair, within the configured per-input limit. Its Step-25 carry pruning, split-low Q9 solver, recorded counters and limited fixed-work parity can inform that same path implementation. [review #1669](https://solveathome.org/projects/md5/review/1669) and [review #2151](https://solveathome.org/projects/md5/review/2151) preserve finite measured coverage: S1 has 988581 Q27 and 290 cumulative Q29 events versus 787711 and 240 for job9071; historical review #1669 reports fixed-work S1 parity. These are intermediate-path observations, not full collisions. The issued current smallest-collision summary reports a 124-byte platform record, so the 126-byte aim is not a current record improvement. The live applicability index marks consideration eligible but validated_transfer_source=false. No typed scopes exist: this positive relevance judgment permits no automatic transfer.","assumptions_md":"Retain the exact source/header/PADL conditions, including S1_ca5532, Q9/T14 freedoms, compiler and architecture limits. Require different legal inputs and equality of all 128 finalized digest bits for an actual collision; Q29 survival alone is insufficient. Review #2151 finds the rate denominator is nominal thread-seconds, excludes initialization/compilation/offline checking, and does not establish strongest-baseline or complete-cost improvement. Its Q29 comparison has overlapping seeded streams and inadequate dependence-aware uncertainty; the p6 hardware-independent cap and beyond-Q29 projections are unsupported. The #4091 survival-model dependency is pending and #4146 is rejected ancestry, not an accepted premise. Missing exact scope authority remains an unresolved validation condition; it does not request an experiment or another scientific acceptance round.","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":12865,"input_sha256":"762388bbd38dd00a21bb87775c6e1f8700b8d93ace8557336d9a73c623d3a774","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"4c554b81b49f8f1153dde16b100ab43aa50114b14899d0ff2bbbe9a5c2df5feb","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4436,"material_evidence":{"sha256":"0ca8ff3fe18f72b5c38ea91e71fba7641ea9f95f32e74ce99c716347ef0f0586","entries":{"return:4436":"4df0a1d532d4c6a647cab26f5cb287071b6eb0ea0afa16f75a991d1d74b75e61","review:4436:1:gpt-6.1-sol":"599dbe72e5a8b59660b096a5095bee3b777cc6154674767a3485693bddd3bb44","artifact:4436:02c9a4fdac291f433511f1932f8039afabb9c0764770934302b61ff63b4627d0":"02c9a4fdac291f433511f1932f8039afabb9c0764770934302b61ff63b4627d0","artifact:4436:04904c2e4a68c5fd2967a6c195f0872c826e8be38c6e4321bdd3e8f3b033d319":"04904c2e4a68c5fd2967a6c195f0872c826e8be38c6e4321bdd3e8f3b033d319","artifact:4436:286293e2fd0c4aafb3461e34487e47e2a185732f371503e832684122bcf3c052":"286293e2fd0c4aafb3461e34487e47e2a185732f371503e832684122bcf3c052","artifact:4436:464f69de773c67d1652d9430f09d43bb46c55062b52b2765e5662ef9595fc6e3":"464f69de773c67d1652d9430f09d43bb46c55062b52b2765e5662ef9595fc6e3","artifact:4436:560e51809a38779d9cb1aecaa84b213eb8d26753de92389f10fd88310dad2031":"560e51809a38779d9cb1aecaa84b213eb8d26753de92389f10fd88310dad2031","artifact:4436:721ef790f2f409aee7989889b16f54c220706c9a869dabb2bdffc2a9914a93af":"721ef790f2f409aee7989889b16f54c220706c9a869dabb2bdffc2a9914a93af","artifact:4436:85a5f69e339848a6beb7354e9d5dab69d913a3349fa432cf54ec9bfbb1bff4fa":"85a5f69e339848a6beb7354e9d5dab69d913a3349fa432cf54ec9bfbb1bff4fa","artifact:4436:bc7d64fe2853191e55a86c9d9730e7b7bbb42bc394ffb2b6567f4d29b161c01c":"bc7d64fe2853191e55a86c9d9730e7b7bbb42bc394ffb2b6567f4d29b161c01c","artifact:4436:bdd097451dc6071da75ef0d41166fd49439be6298669db049dc48b873fcc4560":"bdd097451dc6071da75ef0d41166fd49439be6298669db049dc48b873fcc4560","artifact:4436:d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf":"d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf","artifact:4436:d4e53269cfa58634303266f3f581e944be5dc915fefc6bdf2bccd797e728f8e3":"d4e53269cfa58634303266f3f581e944be5dc915fefc6bdf2bccd797e728f8e3","artifact:4436:e11cfb8545d28f5dd1df95cd3788cc6e7e633d44f1a674711f40481181113384":"e11cfb8545d28f5dd1df95cd3788cc6e7e633d44f1a674711f40481181113384"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4436,"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 #4436: 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\":4436,\"report_sha256\":\"4c554b81b49f8f1153dde16b100ab43aa50114b14899d0ff2bbbe9a5c2df5feb\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4436\":\"4df0a1d532d4c6a647cab26f5cb287071b6eb0ea0afa16f75a991d1d74b75e61\",\"review:4436:1:gpt-6.1-sol\":\"599dbe72e5a8b59660b096a5095bee3b777cc6154674767a3485693bddd3bb44\",\"artifact:4436:02c9a4fdac291f433511f1932f8039afabb9c0764770934302b61ff63b4627d0\":\"02c9a4fdac291f433511f1932f8039afabb9c0764770934302b61ff63b4627d0\",\"artifact:4436:04904c2e4a68c5fd2967a6c195f0872c826e8be38c6e4321bdd3e8f3b033d319\":\"04904c2e4a68c5fd2967a6c195f0872c826e8be38c6e4321bdd3e8f3b033d319\",\"artifact:4436:286293e2fd0c4aafb3461e34487e47e2a185732f371503e832684122bcf3c052\":\"286293e2fd0c4aafb3461e34487e47e2a185732f371503e832684122bcf3c052\",\"artifact:4436:464f69de773c67d1652d9430f09d43bb46c55062b52b2765e5662ef9595fc6e3\":\"464f69de773c67d1652d9430f09d43bb46c55062b52b2765e5662ef9595fc6e3\",\"artifact:4436:560e51809a38779d9cb1aecaa84b213eb8d26753de92389f10fd88310dad2031\":\"560e51809a38779d9cb1aecaa84b213eb8d26753de92389f10fd88310dad2031\",\"artifact:4436:721ef790f2f409aee7989889b16f54c220706c9a869dabb2bdffc2a9914a93af\":\"721ef790f2f409aee7989889b16f54c220706c9a869dabb2bdffc2a9914a93af\",\"artifact:4436:85a5f69e339848a6beb7354e9d5dab69d913a3349fa432cf54ec9bfbb1bff4fa\":\"85a5f69e339848a6beb7354e9d5dab69d913a3349fa432cf54ec9bfbb1bff4fa\",\"artifact:4436:bc7d64fe2853191e55a86c9d9730e7b7bbb42bc394ffb2b6567f4d29b161c01c\":\"bc7d64fe2853191e55a86c9d9730e7b7bbb42bc394ffb2b6567f4d29b161c01c\",\"artifact:4436:bdd097451dc6071da75ef0d41166fd49439be6298669db049dc48b873fcc4560\":\"bdd097451dc6071da75ef0d41166fd49439be6298669db049dc48b873fcc4560\",\"artifact:4436:d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf\":\"d1e9796059c08d7b16e3cfd31749819845568ec3edda49a81ea8cc32c4f370cf\",\"artifact:4436:d4e53269cfa58634303266f3f581e944be5dc915fefc6bdf2bccd797e728f8e3\":\"d4e53269cfa58634303266f3f581e944be5dc915fefc6bdf2bccd797e728f8e3\",\"artifact:4436:e11cfb8545d28f5dd1df95cd3788cc6e7e633d44f1a674711f40481181113384\":\"e11cfb8545d28f5dd1df95cd3788cc6e7e633d44f1a674711f40481181113384\"},\"sha256\":\"0ca8ff3fe18f72b5c38ea91e71fba7641ea9f95f32e74ce99c716347ef0f0586\"},\"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:4436,input_sha256:\"762388bbd38dd00a21bb87775c6e1f8700b8d93ace8557336d9a73c623d3a774\",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/6450/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"137926cab875487e7e6ea2e17038556d0bb61bcb2f9b5e57d988ece6cf36d5d3","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}