{"id":4600,"job_id":7437,"problem_id":6,"lane_id":null,"type":"explore","user_id":1,"model":"gpt-6.1-sol","provider":"openai","report_md":"Job #7437: bounded applicability consideration of accepted return #3160. This administrative relevance judgment is heuristic; it makes no new scientific claim. The source remains accepted/measured under trusted reviews #1089 and #1256; its saturation projections remain heuristic.\n\nThe current returned report hashes to 6dcac1f7d6d3f449e148c4daa6a28f4027aceb0604650d3a6d421cf925e0c9ef, exactly the issued snapshot. All 13 returned artifact-reference hashes equal the issued artifact set. This is reference-metadata comparison, not a fresh download or rehash of artifact bytes. Both source reviews currently report needs_reassessment=false, the source is non-provisional and unsuperseded, and its research authority has zero typed scopes. The bounded live applicability index did not include #3160 among its 15 returned sources; that omission is not evidence of lost acceptance. The direct return establishes the current accepted status.\n\n| Target | Relevance decision | Boundary |\n|---|---|---|\n| self-match | inapplicable | Original d6 70-byte collision family is not the required 32-byte lowercase-ASCII fixed-point domain. |\n| all-zeros | unresolved | Class-weight accounting is a possible bridge; the source gives no absolute-zero predicate or legal target-specific class/yield evidence. |\n| smallest-collision | applicable, provisional | Original d6 class-weight/revisit accounting informs collision-search planning, within its single-IHV restrictions. |\n\nThe entries below carry the detailed evidence and assumptions. Every scope_keys list is empty because the accepted source is unscoped. No new scope, endorsement, validated transfer, research route, scientific acceptance, document integration or next experiment is requested.\n\nPreserved reviewer corrections: the padding constant is 0x00800000|u; the main raw/uniform ratio 0.988 with reported interval [0.967,1.009] uses the stratified uniform estimate. Review #1256’s fresh run gives 0.940 [0.887,0.995], with a reported pooled ratio 0.982 [0.963,1.002]; these intervals do not model class clustering and do not establish exact independence from g. The 2904 maximum is a recorded-sample maximum. Poisson visits are an approximation under IID assumptions. The 7.5686-hour saturation crossing is not an expected waiting time. The original record is not publicly reconstructable from this package, although the later review supplies independent fresh-sample evidence. The source’s <=7.034 CPU-hour figure is historical wall-times-thread-count accounting, not observed CPU for this assignment.\n\nPrior-work lookup began with the latest local topic summaries (collision-padding, self-match and all-zeros, dated 2026-10-10); they predate #3160 and contain no mention of it. The issued current lane summaries and the direct accepted source/reviews supplied the relevant evidence. The original dependencies #3110, #3126, #3124 and #3075 are retained as source attribution, not independently revalidated here. No wider evidence survey or scientific rerun was performed.\n\nScientific execution in this assignment: none; actual scientific CPU time 0 seconds, cpu_hours=0. Small JSON parsing and SHA-256 metadata checks only. The first scoped shared-research fetch failed DNS; the authorized retry succeeded. No source or execution blocker remains. The issued brief reports 122 returns awaiting verdict; no action is requested.\n\nSources: /projects/md5/return/3160 (report, claims 1–5, Limits, recipe, references and embedded current reviews); /projects/md5/review/1089 (analytic and sampling qualifications); /projects/md5/review/1256 (fresh-seed check and corrected projection interpretation); /projects/md5/research-protocol?section=shared-research (Cross-area applicability); /projects/md5/research-applicability (bounded live index); issued applicability target domains and current lane summaries. No primary paper, contributor executable or original raw record was newly fetched or executed.\n","patch":null,"cpu_hours":0,"hashes":{},"author_rung":"heuristic","status":"recorded","final_rung":"recorded","created_at":"2026-10-18T17:21:55.895Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":[],"returns":[3160],"messages":[]},"tokens":{"log":"summary","input":95292,"models":{"gpt-6.1-sol":8313},"output":8313,"source":"reported","entries":0,"cache_read":990720,"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":"2026-10-18T17:22:03.912Z","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_d8eee81ec626e24f190acb4e","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 #3160, claims 1–5 and Limits, with reviews #1089 and #1256: the measured population is the d6 dbbw final-block search on one fixed block-1 chaining value, for two 70-byte collision members. Self-match requires exactly 32 lowercase hexadecimal ASCII bytes and agreement with that same input, beginning at character zero. Neither the d6 padding family nor its relational differential-path predicate supplies that domain or absolute fixed-point predicate. The reported g distribution, step-32 survival, duplicate rate and projected 140-byte search cost therefore do not apply directly. General bookkeeping analogies alone do not establish a matching self-match method.","assumptions_md":"This inapplicability concerns the original source mechanism and measured population, not every possible 32-byte enumerator. A future legal ASCII32 class construction would need its own invariant, base-preimage multiplicities, target predicate and complete cost evidence. No impossibility or closure of self-match research follows.","transfer_eligible":false,"provisional_relevance":true},{"decision":"unresolved","target_id":"all-zeros","scope_keys":[],"evidence_md":"Return #3160, claims 1–4, and reviews #1089/#1256 give a possible bridge in accounting: unequal generator preimages weight emitted legal messages by g, and repeated messages reduce distinct trials. Its 70-byte messages fit the all-zeros byte-length allowance, but a collision relation or survival to step 32 does not impose an absolute zero digest or prove improved zero-prefix yield. The measured d6 g law and survival ratios belong to a different acceptance predicate. No inspected source supplies a corresponding legal all-zeros equivalence relation, representative mapping or setup-adjusted distinct-digest yield. Thus the bookkeeping relevance is possible, while applicability as an all-zeros search method is unresolved.","assumptions_md":"Full 64-step RFC-IV MD5 with exact padding and 0–1024 input bytes remains mandatory. Any reuse must establish its own class/preimage law and distinguish repeated messages from distinct messages sharing a digest; neither guarantees independent zero-target trials. Charge base construction, rejected draws, checks and deduplication. No source numerical rate or collision-tail probability transfers. Missing typed scope authority additionally prevents validated automatic transfer; this entry requests no experiment or review.","transfer_eligible":false,"provisional_relevance":true},{"decision":"applicable","target_id":"smallest-collision","scope_keys":[],"evidence_md":"Provisional relevance within the source’s original d6 collision-search scope. Return #3160 claims 1–3 and 5, narrowed by reviews #1089/#1256, directly address class-size weighting and revisit saturation in the dbbw collision enumerator. The retained main stream has 438090052 legal occurrences, 13299 step-32 survivors and no full collision; a 6847204-occurrence recorded subset has 750243 duplicate pairs versus a model plug-in of about 750511. Review #1256 reports fresh-seed confirmation (9705 versus 9767 duplicate pairs). This informs honest accounting of trials and conditional planning for 70+70-byte candidates, which lie inside the target domain even though they do not improve the current 126-byte record stated in the issued brief. It establishes no shorter collision, new implementation gain or current best search strategy.","assumptions_md":"Retain one fixed block-1 IHV, d6, the original dbbw guard/coset mapping, mask M=~Q2 & Q3 & allow(IHV) & 0x7fffffff and corrected m1=0x00800000|u. There are 2^47 stipulated base points and g admissible preimages per legal output. IID uniform bases are a model premise: finite class counts are binomial, with a Poisson approximation. Inverse-g estimates are conditional on sampling assumptions, not a full census. The historical original raw-record reconstruction remains unavailable; review #1256 provides a separate fresh sample. Cluster-aware uncertainty is unmodelled. Lambda6=3.02, full-solution/g uniformity and cross-IHV transfer remain untested assumptions. The 7.5686 versus 4.5698 hours are conditional model times to mean one distinct discovered solution, not expected first-hit waiting times. Canonical filtering and IHV rotation remain proposals, not measured gains. No typed scopes exist: this applicable entry is provisional and not eligible for 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":true},"effective":true,"check_job_id":7437,"input_sha256":"6c374b077b923d6089a1995ece49c0599130ad69001f42d75fef8f50db313936","source_snapshot":{"version":"research-applicability-v1","scope_hashes":[],"report_sha256":"6dcac1f7d6d3f449e148c4daa6a28f4027aceb0604650d3a6d421cf925e0c9ef","targets_sha256":"b975e91f005e279621dcdaafa92a1369a7129de37d0a225f6a815f014a3b9209","source_return_id":3160,"material_evidence":{"sha256":"1679ee566bed62be30f5a262829420b745d758464ba9714fba49d1560baa612b","entries":{"return:3160":"c7b8020c55ca717fed4e0a206ed130cc358091fbc5e19f299edf5c9831dcaef5","artifact:3160:0d3f62de3c3a9332162a2eb11457dd81c73efb05faa5149863aa34b38b9410fa":"0d3f62de3c3a9332162a2eb11457dd81c73efb05faa5149863aa34b38b9410fa","artifact:3160:1481ae8de12f968029d221d63c7a0c4f06307690059fac0f1f533d29bc4a3e18":"1481ae8de12f968029d221d63c7a0c4f06307690059fac0f1f533d29bc4a3e18","artifact:3160:2c9ae561e142c69e66834761488e8b580de84f343922eed5699304d3217cb03e":"2c9ae561e142c69e66834761488e8b580de84f343922eed5699304d3217cb03e","artifact:3160:6e7db70e061deeea6b5637a92a9d4a76a5cf76e5b571a3e0cf7591f78b0138a5":"6e7db70e061deeea6b5637a92a9d4a76a5cf76e5b571a3e0cf7591f78b0138a5","artifact:3160:77c318c102cbcaba26a9cde507ffe7efe5e3a475ef4cb876e3a1a466b5935f53":"77c318c102cbcaba26a9cde507ffe7efe5e3a475ef4cb876e3a1a466b5935f53","artifact:3160:83934889c4d96a4802bd3aa2421da66fc18cbc75983d6c9570ea26a2ad064797":"83934889c4d96a4802bd3aa2421da66fc18cbc75983d6c9570ea26a2ad064797","artifact:3160:8618695ebb4ac27b8cf83e9f6cfebc505458461d27be217484d10afc34b9bafd":"8618695ebb4ac27b8cf83e9f6cfebc505458461d27be217484d10afc34b9bafd","artifact:3160:9d88fa03c428bbf1a424b8aa5ab1aa8154b05c3260adb932621c8aeb7ec90c8e":"9d88fa03c428bbf1a424b8aa5ab1aa8154b05c3260adb932621c8aeb7ec90c8e","artifact:3160:b334af9f91a1c25056f78306d62a57745b31304d4692d8444b194894f8a08520":"b334af9f91a1c25056f78306d62a57745b31304d4692d8444b194894f8a08520","artifact:3160:c54425f4ced91d1f5e3b4f6755801a6c17dbe64f035327835ee4785f593058bf":"c54425f4ced91d1f5e3b4f6755801a6c17dbe64f035327835ee4785f593058bf","artifact:3160:cefa851968b858b111e063aa4288a052ad2ac7ef902e9e75944d6dde06802304":"cefa851968b858b111e063aa4288a052ad2ac7ef902e9e75944d6dde06802304","artifact:3160:d32b503b274c1794b1abae5e4d36ccc4ca6c79009aa65d519e9152406a3d7b45":"d32b503b274c1794b1abae5e4d36ccc4ca6c79009aa65d519e9152406a3d7b45","artifact:3160:ed3f432b6179fa1d57865d16a13c50ce215a377c60d62e89d913fddf5892d1c6":"ed3f432b6179fa1d57865d16a13c50ce215a377c60d62e89d913fddf5892d1c6"},"version":"material-evidence-v1"},"consideration_only":true},"source_return_id":3160,"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 #3160: 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\":3160,\"report_sha256\":\"6dcac1f7d6d3f449e148c4daa6a28f4027aceb0604650d3a6d421cf925e0c9ef\",\"scope_hashes\":[],\"material_evidence\":{\"version\":\"material-evidence-v1\",\"entries\":{\"return:3160\":\"c7b8020c55ca717fed4e0a206ed130cc358091fbc5e19f299edf5c9831dcaef5\",\"artifact:3160:0d3f62de3c3a9332162a2eb11457dd81c73efb05faa5149863aa34b38b9410fa\":\"0d3f62de3c3a9332162a2eb11457dd81c73efb05faa5149863aa34b38b9410fa\",\"artifact:3160:1481ae8de12f968029d221d63c7a0c4f06307690059fac0f1f533d29bc4a3e18\":\"1481ae8de12f968029d221d63c7a0c4f06307690059fac0f1f533d29bc4a3e18\",\"artifact:3160:2c9ae561e142c69e66834761488e8b580de84f343922eed5699304d3217cb03e\":\"2c9ae561e142c69e66834761488e8b580de84f343922eed5699304d3217cb03e\",\"artifact:3160:6e7db70e061deeea6b5637a92a9d4a76a5cf76e5b571a3e0cf7591f78b0138a5\":\"6e7db70e061deeea6b5637a92a9d4a76a5cf76e5b571a3e0cf7591f78b0138a5\",\"artifact:3160:77c318c102cbcaba26a9cde507ffe7efe5e3a475ef4cb876e3a1a466b5935f53\":\"77c318c102cbcaba26a9cde507ffe7efe5e3a475ef4cb876e3a1a466b5935f53\",\"artifact:3160:83934889c4d96a4802bd3aa2421da66fc18cbc75983d6c9570ea26a2ad064797\":\"83934889c4d96a4802bd3aa2421da66fc18cbc75983d6c9570ea26a2ad064797\",\"artifact:3160:8618695ebb4ac27b8cf83e9f6cfebc505458461d27be217484d10afc34b9bafd\":\"8618695ebb4ac27b8cf83e9f6cfebc505458461d27be217484d10afc34b9bafd\",\"artifact:3160:9d88fa03c428bbf1a424b8aa5ab1aa8154b05c3260adb932621c8aeb7ec90c8e\":\"9d88fa03c428bbf1a424b8aa5ab1aa8154b05c3260adb932621c8aeb7ec90c8e\",\"artifact:3160:b334af9f91a1c25056f78306d62a57745b31304d4692d8444b194894f8a08520\":\"b334af9f91a1c25056f78306d62a57745b31304d4692d8444b194894f8a08520\",\"artifact:3160:c54425f4ced91d1f5e3b4f6755801a6c17dbe64f035327835ee4785f593058bf\":\"c54425f4ced91d1f5e3b4f6755801a6c17dbe64f035327835ee4785f593058bf\",\"artifact:3160:cefa851968b858b111e063aa4288a052ad2ac7ef902e9e75944d6dde06802304\":\"cefa851968b858b111e063aa4288a052ad2ac7ef902e9e75944d6dde06802304\",\"artifact:3160:d32b503b274c1794b1abae5e4d36ccc4ca6c79009aa65d519e9152406a3d7b45\":\"d32b503b274c1794b1abae5e4d36ccc4ca6c79009aa65d519e9152406a3d7b45\",\"artifact:3160:ed3f432b6179fa1d57865d16a13c50ce215a377c60d62e89d913fddf5892d1c6\":\"ed3f432b6179fa1d57865d16a13c50ce215a377c60d62e89d913fddf5892d1c6\"},\"sha256\":\"1679ee566bed62be30f5a262829420b745d758464ba9714fba49d1560baa612b\"},\"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:3160,input_sha256:\"6c374b077b923d6089a1995ece49c0599130ad69001f42d75fef8f50db313936\",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/4600/transcript","files":[],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"6d6c073598a10dc0cc743af94cc97e29d10935e436e76f3a009deea9f3cc6467","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}