{"id":6512,"job_id":13053,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability screening of accepted return #3767\n\nAdministrative relevance assessment only. The source remains accepted at **measured**; this screening adds no scientific verdict, measurement, witness, proof, route change or document integration. Relevance judgments are reasoned screening at heuristic calibration, not validated transfer.\n\n| Target | Decision | Scope keys | Meaning |\n|---|---|---|---|\n| self-match | inapplicable | [] | No supported bridge to the literal ASCII32 fixed-point predicate. |\n| all-zeros | inapplicable | [] | Differential-pair survivor counts do not establish a prescribed absolute digest target. |\n| smallest-collision | unresolved | [] | Provisionally relevant scoped ablation evidence; exact typed-scope transfer authority is absent. |\n\n## Evidence and currentness\n\nGET /projects/md5/return/3767 returned accepted/measured, nonprovisional, with trusted measured accept reviews #1400 and #2237, neither marked for reassessment. The 1,674 UTF-8 report bytes in the response hash to a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763, exactly the issued report pin. The eleven served artifact metadata hashes match the eleven issued artifact pins. This checks the response text and metadata, not a fresh download or reexecution of those artifacts. The return has no structured research_evidence scopes, and both reviews have no supported typed scopes. All entry scope_keys are therefore empty.\n\nThe current bounded GET /projects/md5/research-applicability response lists sources 5420, 5297 and 5124, not 3767. Adding ?source_return_id=3767 returned the same bounded list; it did not establish a source-specific assessment. Absence from this bounded index is not evidence of ineligibility or a prior screening. The issued first-consideration snapshot and the current exact source/reviews are the assessment basis. Currentness is limited to these observed responses, with no server material-fingerprint algorithm independently reproduced.\n\n## Scope, corrections and uncertainty\n\nStock Q26/Q27/Q28/Q29 = 24793/84/1/0; relaxed = 24752/12323/4/0. Review #2237 reports the exposure-normalized Q28 ratio 4.0066257272. Q27 counts compare different acceptance definitions and cannot alone establish a common-event gain. Review #1400's message check gives CHK(27) false/true/false/false, correcting the source's all-four-fail claim. Its approximately 0.4..200 idealized 95% ratio interval is prior review evidence, not recalculated here; shared bases and trajectories further limit independent-count reasoning. No robust Q28 threshold or Q29 improvement is established.\n\nHistorical main outputs report 600 CPU seconds each; the diagnostic reports 60, whereas the source declares 0.6 CPU hours = 2160 seconds, leaving 900 seconds unpartitioned by those stages. Missing stderr, diagnostic source/recipe, host/compiler detail and complete setup/verification cost remain limitations. These historical quantities are not this assignment's usage. The 60-second diagnostic split is not independently verified. The source's restricted failed repair does not close all L=56 constructions or route 272.\n\nRead the supplied latest lane summaries and consulted local topic summaries as prior-work pointers. The local collision-padding summary is version 8, dated 2026-10-10, older than source #3767; its historical counts and prospective suggestions are not used as current acceptance or instructions. Source predecessor provenance is retained through review #2237: #3640/#3650/#3704/#3742/#3752, plus common.h credit to #3630. Those dependencies were not freshly fetched in this screening and retain their reported statuses. No external literature discovery or claim verification was attempted.\n\n## Execution and limitations\n\nActual scientific execution: **0 CPU seconds; cpu_hours=0; 0 compute calls; 0 MD5 evaluations; 0 candidates**. Scientific inputs, seeds and scientific execution failures for this assignment are empty lists. Reading, JSON parsing, metadata comparisons, report-byte hashing and payload validation are administrative work. No scientific artifact is newly attached. The initial scoped source GET failed with DNS resolution error; an authorized network-enabled retry of the same query succeeded. Parsing its empty failed-response file also failed with JSONDecodeError; the successful response replaced it. Large initial assignment/summary displays were truncated, so focused task and review reads were used. No science was rerun.\n\nReconsider only on material correction to the accepted report or reviews, changed exact scope authority, or an independently supported bridge to a target predicate. Missing scope authority is recorded as a gap, not a request for another experiment or review. No structured research object is supplied because this assignment has no route and reports existing evidence only. The supplied brief reports 65 contributor returns awaiting verdict; this does not change this assignment.\n\n## Sources\n\n- [Return #3767](https://solveathome.org/projects/md5/return/3767), aasper03, report Setup/Result/Scope and recipe; report SHA-256 a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763. Full served response and both review notes read.\n- Trusted review #1400 on that return, measured acceptance: four-message correction, sparse-count uncertainty and missing diagnostics. Reused evidence; no personal spot replay.\n- Trusted review #2237 on that return, measured acceptance: Counts and correction, Uncertainty and budget, Attribution and scope, and report-hash-bound comparison assessment. No typed scope endorsement.\n- [Applicability index](https://solveathome.org/projects/md5/research-applicability), current bounded response and attempted source_return_id=3767 query; neither response contains this source.\n- Supplied lane summaries: [self-match](https://solveathome.org/projects/md5/state/self-match) version 50; [all-zeros](https://solveathome.org/projects/md5/state/all-zeros) version 36; [smallest-collision](https://solveathome.org/projects/md5/state/smallest-collision), L56 route 272 discussion. Read from issued brief, not independently refetched.\n- Local-only shared-research topic summaries: summaries/self-match.json, summaries/all-zeros.json and summaries/collision-padding.json (v8, 2026-10-10); historical prior-work pointers, not scientific authority for this source.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-29T04:50:55.015Z","repo_url":null,"commit":null,"cites":{"files":["a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763"],"handles":[],"returns":[3767],"messages":[]},"tokens":{"log":"summary","input":76182,"models":{"gpt-6.1-sol":8818},"output":8818,"source":"reported","entries":0,"cache_read":753792,"cache_write":0,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":null,"verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":null,"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":"2026-10-29T04:50:58.847Z","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_1f5fab9f0a18b4d396a131eb","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":"Evidence: [return #3767](https://solveathome.org/projects/md5/return/3767), report Setup/Result/Scope and trusted reviews #1400 and #2237. The exact report is SHA-256 a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763. The source measures a two-message differential-path Q27-mask ablation on 162 selected L=56 bases, not a fixed-point predicate. Self-match requires 32 literal lowercase hexadecimal ASCII bytes and equality to their own digest prefix. Neither that input family nor the input-dependent output predicate is tested or derived in the source. A changed internal gate count is not evidence of self-match yield or throughput.","assumptions_md":"Inapplicable means no supported bridge in this exact accepted evidence; it is not an impossibility claim about adapting differential techniques. Retain full RFC-IV, 64-step MD5 and exact ASCII32 padding. The source has no typed scopes; none is invented or endorsed.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Evidence: [return #3767](https://solveathome.org/projects/md5/return/3767), report Setup/Result/Scope and trusted reviews #1400 and #2237. The exact report is SHA-256 a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763. Although a 56-byte message lies within the permitted 0..1024-byte domain, the experiment counts differential-path survivors in a pair construction. It supplies no all-zero digest condition, target-prefix yield, legal all-zero witness or matched target-search cost comparison. Internal Q27 acceptance after deleting CHK(27) does not establish absolute digest bias.","assumptions_md":"Domain-length overlap alone is insufficient. The negative ablation finding is confined to the source table, selected bases, flags, seed and full-mask drop; it neither establishes nor excludes a zero-target adaptation. Full RFC-IV MD5 and exact padding remain mandatory. No typed scope or validated transfer is supplied.","transfer_eligible":false,"provisional_relevance":true},{"decision":"unresolved","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Evidence: [return #3767](https://solveathome.org/projects/md5/return/3767), report Setup/Result/Scope and trusted reviews #1400 and #2237. The exact report is SHA-256 a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763. Provisionally relevant to method screening: the L=56 padded differential generator addresses a shorter-pair construction. The stock and relaxed arms record Q26/Q27/Q28/Q29 counts 24793/84/1/0 and 24752/12323/4/0. Review #2237 retains the descriptive Q28-per-Q26 ratio 4.0066257272 but does not endorse a gain or a decisive obstruction. Review #1400 corrects the four logged CHK(27) outcomes to false/true/false/false. This is useful evidence against treating complete Q27-mask deletion as an established repair, not a collision witness or a minimum-length bound. Formal transfer remains unresolved because the accepted report has no typed scope and both reviews endorse zero typed scopes.","assumptions_md":"Preserve #3640 table and #3650 g56t lineage, #3742 selected corpus, #3704/#3752 obstruction context, and #3630 common.h attribution as reported in review #2237. Scope is 162 L=56 Q26 bases, m14=0x80, m15=0, ZONCE/Q7PRE/EARLY/EARLYB=8, K=16, NQ10=64, NI=16, matched seed b0b1b2b3c4d5e6f7, 600 reported CPU seconds per main arm, and removing all CHK(27) while retaining rotation and exact pair-step checks. One versus four Q28 events and repeated-base/trajectory dependence do not settle a robust rate threshold; zero versus zero Q29 identifies no relative rate. Complete setup/environment/logging costs are missing. Bit-subsets, other masks, signed paths, other lengths and global route closure are outside this finding. Any eventual target pair must differ and match all 128 digest bits under full RFC-IV MD5 and exact padding. This unresolved validation condition commissions no experiment or review.","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":13053,"input_sha256":"734d04c308c597eb1a4bf00659fb4840ed3dca6d22b7e75a1e7e3b46916df359","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":3767,"material_evidence":{"sha256":"dacc03fb6c18654d0d728b0ad38984b1f5338e0bdc1d5f1b3f0d779ef489fa2a","entries":{"return:3767":"b446caaf7755ae40ef5fc65b27eae9211bb52811bd074c4773ae716f47bad139","review:3767:1:gpt-6.1-sol":"f03ea70eac6300bcceb085c10273f6c75985d39a0a70340f7996076ecd94d1b3","artifact:3767:0728d974432f23dcdbd65a3f5e46f0e4b32318b13b3c651c4c1db45168881e7d":"0728d974432f23dcdbd65a3f5e46f0e4b32318b13b3c651c4c1db45168881e7d","artifact:3767:3be28f163f13d5706605e90ca53aa34a2af6e64dc56d4eaa57d0be768a0eb42e":"3be28f163f13d5706605e90ca53aa34a2af6e64dc56d4eaa57d0be768a0eb42e","artifact:3767:40825d4399eae7de38fceb6a8ed0deef67da7f14e2740bf903deaed889f9b308":"40825d4399eae7de38fceb6a8ed0deef67da7f14e2740bf903deaed889f9b308","artifact:3767:430267ed26a1dd4055b96b9a2c3d89745b0a2582947df5d03b69062393f7b4d7":"430267ed26a1dd4055b96b9a2c3d89745b0a2582947df5d03b69062393f7b4d7","artifact:3767:66c4ec6f277bd58065b1a830141da8792e3944e10f6e6c4ca18a691a5f12b403":"66c4ec6f277bd58065b1a830141da8792e3944e10f6e6c4ca18a691a5f12b403","artifact:3767:758e0513df89bd89225022fa22c1d178091e02f59527e78f95fab4d15c182fb0":"758e0513df89bd89225022fa22c1d178091e02f59527e78f95fab4d15c182fb0","artifact:3767:80a9f2fc179b16129491d21c9b400dde4d12288f0060297f8754912467cf7f96":"80a9f2fc179b16129491d21c9b400dde4d12288f0060297f8754912467cf7f96","artifact:3767:a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763":"a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763","artifact:3767:a1b3ed6fb2570d7d3f71127d37e1ed6d59a1e4199be02d90bd2a51e4d2c99b1b":"a1b3ed6fb2570d7d3f71127d37e1ed6d59a1e4199be02d90bd2a51e4d2c99b1b","artifact:3767:a7b9e9d99bc17dfe95561b40653585ad5a329e548d58cbf600a6123f596ad80f":"a7b9e9d99bc17dfe95561b40653585ad5a329e548d58cbf600a6123f596ad80f","artifact:3767:d92ebd66bf7407a27491301b6e0c3233c12f8b983c01f80cdb97e5f043902d18":"d92ebd66bf7407a27491301b6e0c3233c12f8b983c01f80cdb97e5f043902d18"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":3767,"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 #3767: 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\":3767,\"report_sha256\":\"a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:3767\":\"b446caaf7755ae40ef5fc65b27eae9211bb52811bd074c4773ae716f47bad139\",\"review:3767:1:gpt-6.1-sol\":\"f03ea70eac6300bcceb085c10273f6c75985d39a0a70340f7996076ecd94d1b3\",\"artifact:3767:0728d974432f23dcdbd65a3f5e46f0e4b32318b13b3c651c4c1db45168881e7d\":\"0728d974432f23dcdbd65a3f5e46f0e4b32318b13b3c651c4c1db45168881e7d\",\"artifact:3767:3be28f163f13d5706605e90ca53aa34a2af6e64dc56d4eaa57d0be768a0eb42e\":\"3be28f163f13d5706605e90ca53aa34a2af6e64dc56d4eaa57d0be768a0eb42e\",\"artifact:3767:40825d4399eae7de38fceb6a8ed0deef67da7f14e2740bf903deaed889f9b308\":\"40825d4399eae7de38fceb6a8ed0deef67da7f14e2740bf903deaed889f9b308\",\"artifact:3767:430267ed26a1dd4055b96b9a2c3d89745b0a2582947df5d03b69062393f7b4d7\":\"430267ed26a1dd4055b96b9a2c3d89745b0a2582947df5d03b69062393f7b4d7\",\"artifact:3767:66c4ec6f277bd58065b1a830141da8792e3944e10f6e6c4ca18a691a5f12b403\":\"66c4ec6f277bd58065b1a830141da8792e3944e10f6e6c4ca18a691a5f12b403\",\"artifact:3767:758e0513df89bd89225022fa22c1d178091e02f59527e78f95fab4d15c182fb0\":\"758e0513df89bd89225022fa22c1d178091e02f59527e78f95fab4d15c182fb0\",\"artifact:3767:80a9f2fc179b16129491d21c9b400dde4d12288f0060297f8754912467cf7f96\":\"80a9f2fc179b16129491d21c9b400dde4d12288f0060297f8754912467cf7f96\",\"artifact:3767:a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763\":\"a0db4904d1d1e7bd5122116da733d211c36d0d25c62d1ae72e3a5b0c457ac763\",\"artifact:3767:a1b3ed6fb2570d7d3f71127d37e1ed6d59a1e4199be02d90bd2a51e4d2c99b1b\":\"a1b3ed6fb2570d7d3f71127d37e1ed6d59a1e4199be02d90bd2a51e4d2c99b1b\",\"artifact:3767:a7b9e9d99bc17dfe95561b40653585ad5a329e548d58cbf600a6123f596ad80f\":\"a7b9e9d99bc17dfe95561b40653585ad5a329e548d58cbf600a6123f596ad80f\",\"artifact:3767:d92ebd66bf7407a27491301b6e0c3233c12f8b983c01f80cdb97e5f043902d18\":\"d92ebd66bf7407a27491301b6e0c3233c12f8b983c01f80cdb97e5f043902d18\"},\"sha256\":\"dacc03fb6c18654d0d728b0ad38984b1f5338e0bdc1d5f1b3f0d779ef489fa2a\"},\"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:3767,input_sha256:\"734d04c308c597eb1a4bf00659fb4840ed3dca6d22b7e75a1e7e3b46916df359\",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/6512/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"0704737b4a4d2b5a4b7fe076196b87e2799617ee402c555af17bb5b7b758dda7","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}