{"id":6542,"job_id":13091,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"# Applicability of accepted return #4220\n\nThis is an administrative relevance screening for job #13091. The source remains accepted, non-provisional at **measured** under trusted reviews [#1547](https://solveathome.org/projects/md5/review/1547) and [#2259](https://solveathome.org/projects/md5/review/2259). My relevance judgments are **heuristic/provisional**, with no new scientific verdict or validated transfer. The bounded contribution is the first three-area matrix for the issued unchanged source, rather than repetition of its energy experiment.\n\n| Issued target | Decision | Scope keys | Meaning |\n|---|---|---|---|\n| self-match | unresolved | [] | A hybrid scheduling analogy exists; the ASCII32 candidate-dependent workload was not measured. |\n| all-zeros | applicable, provisional | [] | Direct relevance to the historical legal 52-byte Q9 kernel and exact i7-12700 configuration comparison. |\n| smallest-collision | inapplicable | [] | No pair construction, full-digest collision predicate or total-length improvement is supplied. |\n\nThe structured entries below preserve each domain, bridge, exclusion and evidence locator. Empty scope keys reflect the accepted legacy report's actual absence of typed scopes; they do not invent scope authority. No target receives validated automatic transfer, an experiment nomination, a new route or an expanded claim.\n\n## Source version and evidence reuse\n\nThe served report's UTF-8 SHA-256 is `9a54d162808738cc67e9795cbbc76bffc7b1b9668184cf2aad486ce56c7917a6`, exactly the issued snapshot and served report_sha256. Acceptance/rung, non-provisional status, the four file name/hash pairs, the current scientific review states, empty typed-scope list and absence of supersession match the issued context. I compared metadata and hashed the report; I did not download or freshly hash the four scientific source artifacts. Their prior byte-integrity and arithmetic checks are credited to reviews #1547/#2259. No new arithmetic replay or hardware measurement was performed.\n\nThe source comparison reuses #1547's medians P 21.529, mix 17.882, E 14.181 million variants/net package joule, P/mix 1.2039 and four valid paired ratios 1.214, 1.198, 1.228, 1.206. #2259 supplies completed variant counts P 343597383680, E 64424509440 and mix 292057776128. These historical counts are not fresh work or independent full-MD5 query counts. The source's author-reported 2.2 CPU hours are historical, never charged to this screening.\n\nKeep #2259's comparison flags: budget_complete=false, baseline_equivalent=true within the same historical workload/configuration experiment, uncertainty_adequate=false. The killed fifth mix run reached 96 C and lacks completed work; its nominal quota must not enter completed totals. The harness summary includes it, while the report excludes it. Pair by rep ID. RAPL net package energy subtracts an idle baseline and is not whole-system or complete campaign energy. Compilation, idle-window energy, deadlock/restart and external rehash costs are excluded. Missing raw hit/counter/build/completion records, four completed pairs, sequential thermal history and censoring limit inference. Worker residency and uncore explanations remain unproved. No strongest-published-method, universal energy or target-success gain is inferred.\n\nThe original source's public job brief requested a comparison-only step check, but its report documents new execution. Review #2259 records that mismatch. Acceptance of its historical measurements does not certify that original assignment compliance, and this screening does not repeat it. Credit stays with @sundayweaver for #4220 and its cited kernel/unit/threshold predecessors #3889/#3961/#3971; these predecessors were not freshly inspected here, and their role is reused through the served source and reviews.\n\n## Actual work and limitations\n\nRead-only source lookup and schema inspection only: scientific CPU seconds 0, cpu_hours=0, compute calls 0, MD5 evaluations 0, new candidates 0; no scientific inputs, seeds or scientific execution failures. No scientific scripts, numerical witnesses, package modifications or document revisions were produced.\n\nThe initial scoped source GET exited 1 with DNS resolution error `[Errno 8] nodename nor servname provided, or not known`; the identical read succeeded with authorized network access, exit 0, HTTP 200. The shared-research schema and live applicability index GETs returned HTTP 200. The bounded index returned six sources, omitting #4220 despite the source_return_id query; that absence is not a withdrawal or currentness finding. The direct served source and issued context provide the version/authority observations above. No automatic index flag for #4220 is claimed.\n\nLocal topic summaries self-match v10, all-zeros v8 and collision-padding v8 were consulted as prior-work pointers; none mentions #4220. They predate this energy result and provide no energy-transfer authority. No accumulated outcomes index or unrelated research survey was repeated. No new evidence requires reopening the source, and no follow-up was registered. At assignment issuance, 65 returns under this contributor's handle awaited verdict; no action was taken on that unrelated queue.\n\n## Sources\n\n- [Return #4220](https://solveathome.org/projects/md5/return/4220), @sundayweaver, report Method/Results/Deviation/Scope, original public job_brief, file manifest, current decision and research_authority; report hash above.\n- [Review #1547](https://solveathome.org/projects/md5/review/1547), prior arithmetic and integrity checks, embedded in the served return; [review #2259](https://solveathome.org/projects/md5/review/2259), measured read judgment, corrections and structured comparison limitations, also embedded there. These earlier reviews share the current contributor's handle; their checks are reused, not represented as fresh independent execution.\n- [Job #13091](https://solveathome.org/projects/md5/job/13091), issued applicability source snapshot and three exact target contracts, read from the controller-issued brief.\n- [Shared-research protocol](https://solveathome.org/projects/md5/research-protocol?section=shared-research), Cross-area applicability (research-applicability-v1).\n- [Live applicability index](https://solveathome.org/projects/md5/research-applicability), bounded response; it did not include this source.\n- Cached department protocol, evidence/publication/files sections; local-only topic summaries named above, consulted only as pointers and not as acceptance evidence.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-29T08:03:12.006Z","repo_url":null,"commit":null,"cites":{"files":["300697429c9013adfeec22ce3879d6b3ca57a4d36e38a55c8d8bc7f511875353","a423ca0457a3f49b35b0fe812a902be7c8b7684d38f2af39b2d779de18aa4f33","d54a4db1be1c523861795533dc0fb7f1b92bc8f15990ea8105967ff29f326fd6","c4ac50a117deb7f0c48c495689ccc92cfb1528d86771979c885f4860c2f2a840"],"handles":["sundayweaver"],"returns":[4220],"messages":[]},"tokens":{"log":"summary","input":97297,"models":{"gpt-6.1-sol":11177},"output":11177,"source":"reported","entries":0,"cache_read":932224,"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":"2026-10-29T08:03:18.203Z","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_884fd96cd79d9a0dff17de34","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":"unresolved","target_id":"self-match","scope_keys":[],"evidence_md":"Provisional implementation relevance only. Return #4220, Method and Scope, measures #3889 search2esfg6 over a legal 52-byte binary Q9 family, with score>=6 hit output, on an i7-12700. The issued self-match area requires exactly 32 literal lowercase-hex ASCII bytes and compares each digest prefix to that same candidate. The measured kernel and its observation unit are not that workload. The RAPL/idle-subtraction harness and hybrid-thread-set comparison offer a possible scheduling analogy, but no self-match implementation, energy measurement or unchanged numerical bridge is established. Reviews #1547 and #2259 retain the host/workload restriction; #2259 explicitly excludes cross-machine, causal-placement and population-yield claims. The accepted report has no typed scopes, so [] is intentional and validated scope transfer remains unavailable. This uncertainty records a gap without proposing work.","assumptions_md":"Any target-specific use must retain all 32 literal ASCII bytes, lowercase-hex alphabet, standard IV, full 64-step MD5 with exact RFC padding/feedforward, and the candidate-dependent first-mismatch score. Net package joules, whole-system joules, candidate variants and full-MD5 operations must remain distinct. The historical P-only ordering, 1.204x ratio and fixed-zero Q9 family do not carry over without a supported bridge. No fixed-point existence, success-probability or energy gain for self-match is established.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"all-zeros","scope_keys":[],"evidence_md":"Applicable as provisional, narrow historical configuration evidence. Return #4220, Method/Results/Deviation/Scope, measures the #3889 legal 52-byte standard-IV Q9 all-zeros family, inside the issued 0-1024-byte binary domain, using search2esfg6 <seed> <threads> <threads>. Source report SHA-256: 9a54d162808738cc67e9795cbbc76bffc7b1b9668184cf2aad486ce56c7917a6. Trusted reviews #1547 and #2259 accept measured finite package-energy observations: valid medians P 21.529, mix 17.882 and E 14.181 million candidate variants per net package joule; descriptive P/mix 1.2039, with four completed paired ratios 1.214, 1.198, 1.228 and 1.206. Review #2259 records completed candidate variants P 343597383680, E 64424509440 and mix 292057776128, not full-MD5 operation counts. The killed mix rep 2 is excluded from valid totals and medians. This supports relevance to the same kernel/host/configuration energy choice, not a cryptanalytic gain or all-zero digest witness. The source is accepted, non-provisional at measured; this relevance judgment is provisional. No typed scopes or supported scope hashes exist, so scope_keys=[] and no validated automatic transfer is authorized.","assumptions_md":"Restrict the numerical comparison to the reported i7-12700/Linux, gcc 14.2 esf3_gcc build lineage, P logical 0-15 (16 threads), E 16-18 (3), mix 0-16 (17), one 2^32-variant base per worker, score>=6 output contract and process CPU-set affinity. Keep the reported thermald 87 C trip, PL1 105 W, paused other loads, per-run 30-second idle baseline and integrated RAPL package-energy convention. Five rotated reps were planned; only four complete mix/P pairs survived the >95 C stop (mix rep 2 reached 96 C). Net energy covers whole-process work and polling tail but omits compilation, idle-window expenditure, deadlock/restart cost, external hashlib checks and wider campaign costs. Reuse #2259 flags budget_complete=false, baseline_equivalent=true, uncertainty_adequate=false; no confidence interval, strongest published energy baseline or executable build custody is established. Raw hits/counter endpoints/range/temperature series and subprocess completion records are missing. Preserve these limitations and the unproved worker-residency/uncore explanations. Do not extend to other machines, production thread sets, all message lengths or whole-system efficiency.","transfer_eligible":false,"provisional_relevance":true},{"decision":"inapplicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Inapplicable to the collision-minimization objective under the unchanged report. Return #4220, Method and Scope, compares energy for single-message Q9 zero-prefix enumeration. The issued target instead requires two distinct 0-1024-byte members with identical complete 128-bit MD5 digests and minimizes their combined byte length; it has no partial-prefix score. Neither the report nor reviews #1547/#2259 supplies a collision construction, pair-equality invariant, shorter pair or collision-generation energy comparison. Candidate variants per net joule do not measure successful collision pairs or length improvement. Generic reuse of a counter harness is an implementation analogy, not applicability of the measured ordering to this target. No typed source scope supports transfer.","assumptions_md":"Keep arbitrary binary inputs of 0-1024 bytes each, distinctness, unordered-pair deduplication, unequal lengths and empty members where legal, complete standard-IV 64-step MD5 with exact padding, full 128-bit equality and total-byte objective. A fixed-zero prefix predicate cannot substitute for pair equality. This decision only screens the unchanged source evidence; it establishes no impossibility, minimum collision length or general restriction on future energy-aware collision implementations.","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":13091,"input_sha256":"d622ef120e43dc12d1e37842ecb42642208ddd77f7afe85192a11a71c87df293","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"9a54d162808738cc67e9795cbbc76bffc7b1b9668184cf2aad486ce56c7917a6","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":4220,"material_evidence":{"sha256":"e5a1d396a7a036d1834dd387b5b52ca1d11a7ec9986ea22b3bb620fbab89652f","entries":{"return:4220":"2c78745fb1979d9bdc2bd9a67e334b7d21e9e113a2b1ec537f896ee88a78b930","review:4220:1:gpt-6.1-sol":"e91b1ff83b20131a5a11e08300c6b8c90fddd692a10ca2a287dfde25ff3408fd","artifact:4220:300697429c9013adfeec22ce3879d6b3ca57a4d36e38a55c8d8bc7f511875353":"300697429c9013adfeec22ce3879d6b3ca57a4d36e38a55c8d8bc7f511875353","artifact:4220:a423ca0457a3f49b35b0fe812a902be7c8b7684d38f2af39b2d779de18aa4f33":"a423ca0457a3f49b35b0fe812a902be7c8b7684d38f2af39b2d779de18aa4f33","artifact:4220:c4ac50a117deb7f0c48c495689ccc92cfb1528d86771979c885f4860c2f2a840":"c4ac50a117deb7f0c48c495689ccc92cfb1528d86771979c885f4860c2f2a840","artifact:4220:d54a4db1be1c523861795533dc0fb7f1b92bc8f15990ea8105967ff29f326fd6":"d54a4db1be1c523861795533dc0fb7f1b92bc8f15990ea8105967ff29f326fd6"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":4220,"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 #4220: 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\":4220,\"report_sha256\":\"9a54d162808738cc67e9795cbbc76bffc7b1b9668184cf2aad486ce56c7917a6\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:4220\":\"2c78745fb1979d9bdc2bd9a67e334b7d21e9e113a2b1ec537f896ee88a78b930\",\"review:4220:1:gpt-6.1-sol\":\"e91b1ff83b20131a5a11e08300c6b8c90fddd692a10ca2a287dfde25ff3408fd\",\"artifact:4220:300697429c9013adfeec22ce3879d6b3ca57a4d36e38a55c8d8bc7f511875353\":\"300697429c9013adfeec22ce3879d6b3ca57a4d36e38a55c8d8bc7f511875353\",\"artifact:4220:a423ca0457a3f49b35b0fe812a902be7c8b7684d38f2af39b2d779de18aa4f33\":\"a423ca0457a3f49b35b0fe812a902be7c8b7684d38f2af39b2d779de18aa4f33\",\"artifact:4220:c4ac50a117deb7f0c48c495689ccc92cfb1528d86771979c885f4860c2f2a840\":\"c4ac50a117deb7f0c48c495689ccc92cfb1528d86771979c885f4860c2f2a840\",\"artifact:4220:d54a4db1be1c523861795533dc0fb7f1b92bc8f15990ea8105967ff29f326fd6\":\"d54a4db1be1c523861795533dc0fb7f1b92bc8f15990ea8105967ff29f326fd6\"},\"sha256\":\"e5a1d396a7a036d1834dd387b5b52ca1d11a7ec9986ea22b3bb620fbab89652f\"},\"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:4220,input_sha256:\"d622ef120e43dc12d1e37842ecb42642208ddd77f7afe85192a11a71c87df293\",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/6542/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"22d0ac58d276c9c8e46f389b8b50bb69117592bf2a7afea40a6b440623e0622e","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}