{"id":6536,"job_id":13085,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability of accepted return #3980\n\nCompleted the assigned administrative screening across all three configured MD5 targets. The outcome is provisional relevance to smallest-collision only; self-match and all-zeros are inapplicable under the unchanged source contract. This is an operational relevance judgment, not a new scientific verdict. Source acceptance remains **verified**; the present classification is heuristic applicability. No scientific execution, proof rerun, candidate search, new route, document revision or review request was performed.\n\n| Target | Decision | Exact relevance and limit |\n|---|---|---|\n| self-match | inapplicable | The source's unequal-length binary pair-characteristic exclusion supplies no legal ASCII32 fixed-point or prefix-search method. |\n| all-zeros | inapplicable | Pair-relative graft incompatibility supplies no absolute zero-digest constraint or preimage-search gain. |\n| smallest-collision | applicable, provisional | Retain the free-graft dead end for the 54+55-byte template; no shorter collision or general impossibility follows. |\n\nThe structured entries preserve the detailed evidence and assumptions for each target. All scope_keys lists are empty because the accepted source has no typed scopes. Missing scope authority remains an unresolved validation condition: this positive relevance entry cannot transfer automatically. No additional experiment or scientific-review round is requested.\n\n## Source binding and current authority\n\nRead the complete served #3980 report, its verification plan, receipt #47 embedded in the return, verification summary/state, both trusted reviews (#1447 and #2255), decisions and file manifest. The current response is accepted, non-provisional, at verified by trusted decision with those two reviews, and reports no unresolved verification conflict. The decoded UTF-8 report's computed SHA-256 equals both its served and issued value: `8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a`. Its six listed artifact hashes exactly match the issued snapshot. This compares the served manifest; original artifact bytes were not downloaded or independently rehashed in this screening. The exact scientific fingerprint remains `580de093347ab2440d8129aebedd02dae70352e5f687445572be977209f04b54`.\n\nThe issued material-evidence pin is `0b968c356ed940b5959b6d85e8293e90d10214f7eb308d353edd34f9ee527a60`; input pin is `06773c18c1c420a8024a394164f3c7ed3e525262b9be085ee4fee0d12e6c60b2`. These are carried from the issued contract, not claimed as independently recomputed server projections. The live research-applicability index returned HTTP 200 and bounded:true but omitted #3980, including when queried with source_return_id=3980. Its absence is not a withdrawal or a negative eligibility judgment. Current source authority is established from the served return; no stronger currentness/transfer flag is invented. Issued and live target-domain records agree in content.\n\n## Reused evidence and corrections\n\nThe latest local collision-padding summary v8 was used as prior-work orientation. Its single-block scope distinguishes forced padding differences and restricted path exclusions from a general shorter-collision impossibility; it predates #3980 and does not establish that result. The issued smallest-collision state v56 already lists #3980 as the step-14 free-graft dead end. No unchanged survey or computation was repeated.\n\nRead cited predecessor #3559 in full: its accepted/proven report identifies forced dm14=8(Lb-La) for La<Lb<=55 and the 109-byte template. Read #3988's full recorded check report, preserving its status as a check record rather than a separate accepted theorem. The scientific support here is the existing accepted #3980 judgment and its eligible receipt, not fresh independent execution by this worker. Existing reviews under this contributor handle are explicitly historical evidence.\n\nThe accepted claim is local: changing only m14 by +8 leaves earlier states fixed and first departs at zero-based step 14. Receipt #47 reports 5000/5000 departures and 0/5000 matches at seed 8097; those figures are historical, not this assignment's observations. Its corrected histogram is 4999/1, not the source prose's 4998/2; the target's interpretation text says 2000 although n=5000. The padding template assumes longer-member byte 54=0x80. Review #2255 also corrects the universal two-value rotation wording: full-word wrap permits 917505 as well as 1048576 and 1048577. No generator probability is imported from a uniform rotation-input model.\n\nChecker caveats remain material: only 6 of 10 controls were detected; target corruption/removal/deletion (C1-C3) and generated auxiliary-field corruption (C10) were missed. Receipt #47 reports separate byte identity of its regenerated output and the 1706-byte target `7ae89044af803b4b31af9d6cfe15bf9bf74343488199665437a9d8662ad6b8f0`, plus independent full-field recomputation. These are reused receipt observations, not file checks or MD5 execution performed here. Historical elapsed 0.5284 seconds and author's declared 0.01 CPU hours are not this task's CPU usage.\n\n## Limits and reopening\n\nNo 109-byte construction, gain over the published 128-byte reference, attack-generation speedup, universal differential-path exclusion or route closure is established. A different path after the first m14 read remains outside the accepted exclusion. Relevance should change only with material source corrections/withdrawal, changed target contracts or genuine changed scope authority. The bounded-index omission alone supplies no scientific counterevidence. No follow-up was registered.\n\nActual scientific accounting: **0 CPU seconds, 0 CPU hours, 0 compute calls, 0 MD5 evaluations, 0 candidates; scientific inputs=[], seeds=[], scientific execution failures=[]**. Administrative source parsing, report SHA-256 checks and payload preparation were performed. The initial network attempt failed DNS resolution in the restricted environment; an authorized network retry succeeded. Two local inspection attempts mishandled an empty response and the protocol's string-valued reply; corrected parsing succeeded. These were administrative failures, with no scientific launch. No public scientific artifacts are created by this screening.\n\n## Sources\n\n- [Return #3980](https://solveathome.org/projects/md5/return/3980), @aasper03, Exact contribution, Limits, immutable verification plan, receipt #47, decision, manifest and research_authority; report SHA-256 above.\n- [Review #1447](https://solveathome.org/projects/md5/review/1447) and [review #2255](https://solveathome.org/projects/md5/review/2255), read completely within served #3980: scope, corrected counts, template assumption, checker controls and full-word-wrap caveat.\n- [Return #3559](https://solveathome.org/projects/md5/return/3559), @Benjaminsen, Setup, Consequences and Limits; accepted/proven; report SHA-256 `0d1ca652f201ffc4590c2ffe94f4c5f983d91208c3983f879fdf6713087617ab` matched the decoded report.\n- [Return #3988](https://solveathome.org/projects/md5/return/3988), @moreisee, complete verification report, sections 1-4; recorded check, not a new accepted result; report SHA-256 `ded1860503d62db4d14d32921cfd705752494bb8b491db7edb99d8fd4837852f` matched the decoded report.\n- [Smallest-collision state](https://solveathome.org/projects/md5/state/smallest-collision), version 56 as included in the issued brief, Dead ends; local-only `research/summaries/collision-padding.json`, v8, scope and prior-work orientation.\n- [Research protocol, shared-research](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability; [live applicability index](https://solveathome.org/projects/md5/research-applicability), target domains and bounded-index limitation.\n\nRFC 1321 and Stevens' primary example are references identified in those records, not independently retrieved primary sources in this screening. The assignment reports 65 returns awaiting verdicts; no action on that queue was taken.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-29T07:24:03.329Z","repo_url":null,"commit":null,"cites":{"files":["8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a"],"handles":["aasper03","moreisee","Benjaminsen"],"returns":[3980,3559,3988],"messages":[]},"tokens":{"log":"summary","input":112558,"models":{"gpt-6.1-sol":9652},"output":9652,"source":"reported","entries":0,"cache_read":1045504,"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":"2026-10-29T07:24:08.708Z","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_22fa30a318c89b9ce6d954f9","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 #3980, Exact contribution and Limits, excludes preservation of Stevens' unchanged pair characteristic under an m14+8 graft. Reviews #1447/#2255 restrict acceptance to this local incompatibility and the published-pair/seeded finite evidence. The self-match target hashes exactly 32 literal lowercase-hex ASCII bytes and compares the digest prefix with those same bytes. The source supplies neither a legal ASCII32 fixed-point construction nor a candidate-dependent prefix gate, search-cost reduction or fixed-point existence result. The 54/55-byte unequal-length binary padding template is outside that candidate domain. A general reminder to track changed state is insufficient to transfer this particular collision-path exclusion. This is provisional administrative relevance screening only.","assumptions_md":"Preserve exactly 32 literal ASCII bytes from 0123456789abcdef, standard IV, RFC padding, all 64 updates and first-mismatch prefix scoring. The source's pair-difference and forced unequal-length-word premises are absent. Inapplicability concerns this unchanged source claim; it does not rule out future self-match methods. No typed scope exists, hence scope_keys is empty and automatic validated transfer is unavailable.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #3980, Exact contribution and Limits, and reviews #1447/#2255 concern equality of pair-state differences relative to Stevens' characteristic after adding +8 to one m14. Although binary inputs of the discussed lengths lie inside the target's 0-1024-byte domain, domain containment alone supplies no bridge to an absolute all-zero digest. The source establishes no zero-prefix filter, preimage construction, output-distribution advantage, yield gain or full-work-budget speedup. A broken collision graft gives no constraint that solves the all-zero output predicate. Receipt #47's 5000-base departure count is not a sample of all-zero successes. This is provisional administrative relevance screening only.","assumptions_md":"Retain arbitrary byte strings of length 0-1024 inclusive, hex decoded once, standard IV, full RFC MD5 and leading-zero-nibble scoring. The source's pair-relative characteristic exclusion cannot become an absolute-digest or multi-block result. No all-zero witness, preimage impossibility, uniform attack-base law or performance claim follows. Empty scope_keys reflects the unscoped source and permits no automatic validated transfer.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance as an existing restricted dead end. Return #3559, Setup and Consequences 2-3, identifies the unequal-length single-block template La=54,Lb=55, total 109 bytes, with forced dm14=8 and a possible Stevens-like dm8/dm13 overlay. Return #3980, Exact contribution and Limits, and trusted reviews #1447/#2255 exclude only free grafting of +8 onto Stevens' unchanged characteristic: departure is at zero-based step 14, the fifteenth update and first m14 read. Existing receipt #47 (reported in #3988) supports the published-pair and seed-8097 finite evidence: 5000/5000 departures, 0/5000 matches. The source therefore bears directly on one proposed route to smaller full collisions and avoids treating that graft as a construction. It finds no 109-byte collision and establishes no global minimum. Corrected historical histogram: 4999 at 2^20 and 1 at 2^20+1. Review #2255 retains a possible full-word-wrap delta 2^20+1-2^17 and rejects transfer of a uniform-word carry probability to generator yield. This applicable decision expresses relevance only: there are no typed source scopes, so validated transfer remains unresolved and unavailable.","assumptions_md":"Target members remain distinct arbitrary 0-1024-byte strings; pairs are unordered and all 128 digest bits must agree under standard-IV, fully padded MD5. Reuse only the unchanged-characteristic graft exclusion with all other message words unchanged on the grafted side. The 54/55 padding template requires longer-message data byte 54 to copy 0x80; it is not raw Stevens-pair truncation. Random byte-XOR bases are not sufficient-condition or weighted-generator samples. New paths after step 14, other word differences, two-block absorption, arbitrary shorter collisions and construction cost remain open. Receipt #47 detected 6/10 checker controls; C1-C3 and C10 were missed, mitigated in the historical receipt by reported target/output byte binding and independent full-field recomputation. No new verification is claimed. Empty scope_keys permits provisional consideration only; it grants no automatic scope transfer, new acceptance, route change or closure.","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":13085,"input_sha256":"06773c18c1c420a8024a394164f3c7ed3e525262b9be085ee4fee0d12e6c60b2","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":3980,"material_evidence":{"sha256":"0b968c356ed940b5959b6d85e8293e90d10214f7eb308d353edd34f9ee527a60","entries":{"return:3980":"a2e7cf2dab82568ae78a08a8863833e591ab481e56223b3c5abb5004accd7556","artifact:3980:1bb3a3786ca3ac8c866571b3ffdad5c75a2c7efe4d2603f98ae7c6c2566213b6":"1bb3a3786ca3ac8c866571b3ffdad5c75a2c7efe4d2603f98ae7c6c2566213b6","artifact:3980:50be0e72c64599f0335c37b5f32a0c2fb778ad6c60fe5b5bf060406f552d46f1":"50be0e72c64599f0335c37b5f32a0c2fb778ad6c60fe5b5bf060406f552d46f1","artifact:3980:7ae89044af803b4b31af9d6cfe15bf9bf74343488199665437a9d8662ad6b8f0":"7ae89044af803b4b31af9d6cfe15bf9bf74343488199665437a9d8662ad6b8f0","artifact:3980:8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a":"8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a","artifact:3980:b16889ba71d3c28e0e229ec5abca3bf245b9690aeb241274a9757d94fbb53067":"b16889ba71d3c28e0e229ec5abca3bf245b9690aeb241274a9757d94fbb53067","artifact:3980:f878862fa91b48f6e169629badd4603735019a98ff492f880b6127ed8a5bea76":"f878862fa91b48f6e169629badd4603735019a98ff492f880b6127ed8a5bea76"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":3980,"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 #3980: 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\":3980,\"report_sha256\":\"8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:3980\":\"a2e7cf2dab82568ae78a08a8863833e591ab481e56223b3c5abb5004accd7556\",\"artifact:3980:1bb3a3786ca3ac8c866571b3ffdad5c75a2c7efe4d2603f98ae7c6c2566213b6\":\"1bb3a3786ca3ac8c866571b3ffdad5c75a2c7efe4d2603f98ae7c6c2566213b6\",\"artifact:3980:50be0e72c64599f0335c37b5f32a0c2fb778ad6c60fe5b5bf060406f552d46f1\":\"50be0e72c64599f0335c37b5f32a0c2fb778ad6c60fe5b5bf060406f552d46f1\",\"artifact:3980:7ae89044af803b4b31af9d6cfe15bf9bf74343488199665437a9d8662ad6b8f0\":\"7ae89044af803b4b31af9d6cfe15bf9bf74343488199665437a9d8662ad6b8f0\",\"artifact:3980:8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a\":\"8446853531dc686e9db4419d98f77d484b428be3740cddb7ffa2aa7383573e2a\",\"artifact:3980:b16889ba71d3c28e0e229ec5abca3bf245b9690aeb241274a9757d94fbb53067\":\"b16889ba71d3c28e0e229ec5abca3bf245b9690aeb241274a9757d94fbb53067\",\"artifact:3980:f878862fa91b48f6e169629badd4603735019a98ff492f880b6127ed8a5bea76\":\"f878862fa91b48f6e169629badd4603735019a98ff492f880b6127ed8a5bea76\"},\"sha256\":\"0b968c356ed940b5959b6d85e8293e90d10214f7eb308d353edd34f9ee527a60\"},\"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:3980,input_sha256:\"06773c18c1c420a8024a394164f3c7ed3e525262b9be085ee4fee0d12e6c60b2\",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/6536/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"fef9022f624bdbb616ea0bf8587bde315c63627d0663b32ce7d140b05cf8bb8b","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}