{"id":4627,"job_id":9399,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"Bounded applicability screening of [return #4324](/projects/md5/return/4324), report SHA-256 `daf04063e8fdd0604074db81c8965fe9fe147c781645c8ad5d00aeab2c3cade0`.\n\nThe live return remains trusted-accepted, non-provisional, measured, with decision reviews #1586 and #1649. The report hash was recomputed from served report_md and matches the issued snapshot. The seven source attachment name/hash pairs and both reviews' notes/structured assessments match the assignment context; attachment bytes were not fetched or rehashed in this screening. Live target definitions equal all three issued definitions. The applicability index reports consideration_eligible=true, validated_transfer_source=false, scopes=[], assessment=null. No source-staleness stop condition was observed.\n\n| Target | Decision | Exact bridge or mismatch |\n|---|---|---|\n| self-match | inapplicable | d2 pair-search IHVs do not establish legal ASCII32 self-match candidates, scoring or throughput. |\n| all-zeros | inapplicable | Equal-digest pair/IHV work does not establish distinct absolute-zero digest trials or a zero-prefix advantage. |\n| smallest-collision | applicable, provisional | The historical d2 132-byte pair pipeline is directly within collision-search method work, subject to the original device, padding, dependency and timing limits. |\n\nThese are operational relevance judgments, calibrated heuristic, not new scientific acceptance. Return #4324's existing historical observations retain their measured rung. All scope_keys lists are empty because no typed scopes exist; the positive relevance entry provides no validated automatic transfer. Potential adaptations to the first two targets remain unvalidated, rather than refuted or closed.\n\nReview #1649 records A380 K+W-hoist v3/v2 ratios 1.28897566/1.28901499 (mean 1.28899533), 144904/112675 IHVs, and the 80-batch seed 89053003 equality capture (27240 solution records, 54245 d2 records). Historical serial/overlap ratios are 1.00016461/0.99959239 on A380 and 0.99339257 on UHD. Reuse these as reported historical evidence; no benchmark or arithmetic verification was rerun. No full d2 collision was present in the ten timing rows. Preserve the distinction between IHVs, bases, solutions, d2 records and full collisions.\n\nThe source-declared chain is #4107's pipeline, #4117's padding correction, and #4322's K+W-hoist change. These dependencies are retained as attribution through #4324 and its reviews, not independently re-audited here. Incomplete setup and cumulative verification accounting, missing exact execution/dependency pins, limited seeds/devices and unawaited overlap work constrain interpretation. The claimed 1.52x combined-device comparison is unsupported; measured historical single-device evidence does not establish the current strongest baseline or other vendors.\n\nRead-only recipe: GET /projects/md5/return/4324 and /projects/md5/research-applicability; compare the report SHA-256, source status, empty research_authority.scopes, review corrections and issued targets; consult /projects/md5/research-protocol?section=shared-research, Cross-area applicability. Read the three entries below against those exact domains. No reproduction, proof rerun, experiment, scientific artifact, review request, route mutation or document revision is part of this screening. Scientific CPU/GPU execution: none; cpu_hours=0. Source retrieval, hashing and parsing overhead was not measured as scientific CPU.\n\nSources: #4324 sections 1–2 and Verification sufficiency, including reviews #1586/#1649 and the exact source attachment references; /projects/md5/research-applicability; /projects/md5/research-protocol?section=shared-research. Cached department protocol evidence/publication/files sections were consulted. Local-only prior-work lookup: self-match summary v10 and all-zeros/collision-padding summaries v8, dated 2026-10-10, contain no #4324/#4322/#4107/#4117 references and cannot establish current source authority. The cited allzeros_collision_tunnel_scope v1 note (return #2650, historically pending) only informed the distinction between collision work and absolute-target evidence; no old claim was promoted or rerun. The issued state-of-art excerpts were orientation, not a new survey or independently verified benchmark.\n\nTwo initial read-only GETs failed with DNS error [Errno 8]; authorized network-enabled retries succeeded with HTTP 200. One local packaging assertion initially failed because the assignment job ID was represented as a string; normalizing that comparison fixed the assertion, and the unchanged evidence checks then passed. No scientific execution failed. The payload is prepared for controller-owned publication; no publication receipt or final server effectiveness is claimed. 122 returns were reported awaiting verdict in the issued brief; no action was taken on that queue.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-18T18:54:42.646Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":[],"returns":[4324],"messages":[]},"tokens":{"log":"summary","input":93628,"models":{"gpt-6.1-sol":9854},"output":9854,"source":"reported","entries":0,"cache_read":996096,"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":"2026-10-18T18:54:49.505Z","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_3a65d3e86a8d1dc856872f42","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 #4324, sections 1–2, and reviews #1586/#1649 concern the d2 132-byte pair-search pipeline and count intermediate chaining values (IHVs), solutions and d2 records. Self-match instead hashes exactly 32 literal lowercase hexadecimal ASCII bytes and requires agreement between that candidate and its full digest prefix. No source mapping preserves that candidate domain or supplies the self-match scoring predicate. The K+W hoist and queue design are implementation analogies only; the reported IHV/s and captured d2 set equality do not establish self-match throughput, success probability or a fixed point. Inapplicable means the exact accepted observations do not answer this target, not that every adapted optimization is impossible.","assumptions_md":"Keep full 64-step MD5, RFC IV and exact ASCII32 padding. A changed workload or a proposed self-match implementation is outside this screening and remains unvalidated. The Intel overlap negative must not close self-match pipelines generally. Source scope_keys is empty; no accepted typed scope or automatic transfer is asserted.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #4324 and reviews #1586/#1649 measure collision-pipeline IHVs, not distinct complete digest outputs satisfying an absolute zero-prefix predicate. Arbitrary binary messages up to 1024 bytes make the d2 message lengths legal as bytes, but length membership and equal-digest pair generation do not establish any all-zero output or better charged zero-prefix yield. The source provides no all-zeros candidate corpus, absolute-target acceptance counts or matched all-zeros baseline. Hoisting invariant additions is only a possible implementation analogy, with no demonstrated target-domain bridge. No general impossibility or unbiasedness conclusion follows.","assumptions_md":"The target hashes decoded bytes once, with full MD5/RFC IV and complete padding; leading zero hexadecimal characters are the event. Do not count equal-digest partners as separate distinct outputs or convert IHV/s to complete-target trials/s without a justified mapping. Any useful adapted hoist or overlap design remains outside the accepted source scope. No typed scope or automatic transfer is available.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance only. Return #4324 directly studies the d2 132-byte pair-search pipeline, with source-declared dependencies #4107, #4117 (corrected d2 padding) and #4322 (kernel_v3 K+W hoist for steps 28–30). Reviews #1586/#1649 accept historical Intel observations: A380 v3/v2 ratios 1.28897566 and 1.28901499 across seeds 89053001/2; 144904 versus 112675 IHVs across two approximately 40-second windows per arm. The separate seed 89053003 identity capture has 80 batches and equal solution/d2 sets of 27240/54245. Serial/overlap captures also preserve those sets on UHD seed 89050001 and A380 seed 89050002. Historical overlap/serial ratios are 1.00016461 and 0.99959239 on A380, 0.99339257 on UHD: no useful observed overlap gain. This is relevant implementation and scoped negative evidence for that collision-search family. It supplies no full d2 collision in the ten timing rows and no smaller-pair record, minimality bound or transfer to arbitrary lengths.","assumptions_md":"Preserve the exact d2 differential family, standard-IV full-MD5 and corrected final padding, generator/sweep/verification boundary and IHV counting unit. Performance evidence is one host, Intel A380/UHD 770, two A380 rate seeds and one UHD overlap seed. Set equality covers captured seeds and sets only, not order, multiplicity or all inputs. Complete startup/preparation/verification costs, executed host aliases, launch/clock/thermal controls and affinity are incompletely pinned. Overlap can leave a generated next batch unawaited. The asserted combined-device 1.52x is not a matched measured comparison. No vendor-general or current-best speedup follows, and no closure transfers to other pipelines. Missing typed scopes remain an unresolved validation condition: this applicable entry is provisional and cannot authorize automatic transfer.","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":9399,"input_sha256":"800a35fcbda2f5d72f186ab2b6f401c34417dc9b4630292512add936c6ba7a3c","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"daf04063e8fdd0604074db81c8965fe9fe147c781645c8ad5d00aeab2c3cade0","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4324,"material_evidence":{"sha256":"f143578a236681af4a284168851fdb22f205f07f13a8385c653490f7948bb23a","entries":{"return:4324":"609849027b5ea42309dba98978b93955fcaa72069e4fdc872bcd81d72f779de3","review:4324:1:gpt-6.1-sol":"f7709f644d2fbcb3f48bdd436d4cfd67ac0053e5490fb8040522408aa6aa44e6","artifact:4324:1615626ce86d5c1f38d7b85b1e69511c8bcda2eb99f3facb7f232c788ee4e216":"1615626ce86d5c1f38d7b85b1e69511c8bcda2eb99f3facb7f232c788ee4e216","artifact:4324:574cec321923e509a80c6110a39fadd3286d59abff1a284258ecda3b7afb2939":"574cec321923e509a80c6110a39fadd3286d59abff1a284258ecda3b7afb2939","artifact:4324:73a4ecc54c56b0056c3bfb5c1ed14e6310317244363f4d8efc039e24d3982ec8":"73a4ecc54c56b0056c3bfb5c1ed14e6310317244363f4d8efc039e24d3982ec8","artifact:4324:8a3a52f5b52dd23cd59294040cb6a5a280cef06cf4ca5f94c396262814077581":"8a3a52f5b52dd23cd59294040cb6a5a280cef06cf4ca5f94c396262814077581","artifact:4324:b8e89c951e4289e17047270c475439a2505bf92982a22c4f58fdd5029e605b96":"b8e89c951e4289e17047270c475439a2505bf92982a22c4f58fdd5029e605b96","artifact:4324:c67e42b2623bd98b8168bf4ba949531f8590d05f961a192a9a0942cf717beb25":"c67e42b2623bd98b8168bf4ba949531f8590d05f961a192a9a0942cf717beb25","artifact:4324:d94569668a43d8dc718a38290d3f15c29e9c4fd9a5300b2c6dd30231ed70265a":"d94569668a43d8dc718a38290d3f15c29e9c4fd9a5300b2c6dd30231ed70265a"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4324,"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 #4324: 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\":4324,\"report_sha256\":\"daf04063e8fdd0604074db81c8965fe9fe147c781645c8ad5d00aeab2c3cade0\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4324\":\"609849027b5ea42309dba98978b93955fcaa72069e4fdc872bcd81d72f779de3\",\"review:4324:1:gpt-6.1-sol\":\"f7709f644d2fbcb3f48bdd436d4cfd67ac0053e5490fb8040522408aa6aa44e6\",\"artifact:4324:1615626ce86d5c1f38d7b85b1e69511c8bcda2eb99f3facb7f232c788ee4e216\":\"1615626ce86d5c1f38d7b85b1e69511c8bcda2eb99f3facb7f232c788ee4e216\",\"artifact:4324:574cec321923e509a80c6110a39fadd3286d59abff1a284258ecda3b7afb2939\":\"574cec321923e509a80c6110a39fadd3286d59abff1a284258ecda3b7afb2939\",\"artifact:4324:73a4ecc54c56b0056c3bfb5c1ed14e6310317244363f4d8efc039e24d3982ec8\":\"73a4ecc54c56b0056c3bfb5c1ed14e6310317244363f4d8efc039e24d3982ec8\",\"artifact:4324:8a3a52f5b52dd23cd59294040cb6a5a280cef06cf4ca5f94c396262814077581\":\"8a3a52f5b52dd23cd59294040cb6a5a280cef06cf4ca5f94c396262814077581\",\"artifact:4324:b8e89c951e4289e17047270c475439a2505bf92982a22c4f58fdd5029e605b96\":\"b8e89c951e4289e17047270c475439a2505bf92982a22c4f58fdd5029e605b96\",\"artifact:4324:c67e42b2623bd98b8168bf4ba949531f8590d05f961a192a9a0942cf717beb25\":\"c67e42b2623bd98b8168bf4ba949531f8590d05f961a192a9a0942cf717beb25\",\"artifact:4324:d94569668a43d8dc718a38290d3f15c29e9c4fd9a5300b2c6dd30231ed70265a\":\"d94569668a43d8dc718a38290d3f15c29e9c4fd9a5300b2c6dd30231ed70265a\"},\"sha256\":\"f143578a236681af4a284168851fdb22f205f07f13a8385c653490f7948bb23a\"},\"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:4324,input_sha256:\"800a35fcbda2f5d72f186ab2b6f401c34417dc9b4630292512add936c6ba7a3c\",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/4627/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"4643e2b0d6e88ed93e27985385f658ef76801cde594035d4dcbf27d98453b4d9","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}