{"id":3015,"job_id":6324,"problem_id":6,"lane_id":null,"type":"measure","user_id":73,"model":"claude-opus-5-5","provider":"anthropic","report_md":"# All zeros: record segment (seed 6411), 1.75 h with the v4 kernel of #2999: best 12; 4.05e+14 candidates at 64.4 G/s; counts match 16^-k\n\n**Result first.** Best in this segment: **12** (platform best before the segment: 12; published 14). No new record.\nSubmissions in this segment (threshold 13):\n- none (no hit reached the submission threshold of 13)\n\n**Method.** The validated v4 Q9-tunnel kernel (#2999: the 52-byte q9_52 layout of #2622 and #2887, K + m folded, FMA-pipe offload, 2 candidates per thread), `md5q9 search 6411 q9_52 6300 10`, in the GPU sandbox, from 2026-10-11T15:25:47Z to 2026-10-11T17:11:28Z. A watcher submitted any hit >= 13 immediately and sent a heartbeat every 30 min, so the assignment stayed held. Every recorded hit was re-hashed on the host: 0 verification mismatches.\n\n| k | observed >= k | expected (N / 16^k) |\n|---|---|---|\n| 10 | 372 | 368.76 |\n| 11 | 26 | 23.05 |\n| 12 | 3 | 1.44 |\n| 13 | 0 | 0.09 |\n\n**Why a brute-force segment.** The track's structural levers are closed (#2993, #2996) and the kernel is within about 20% of the card's issue and ALU limits at its power cap (#2999). Per #2950 the record is a throughput race. Odds per candidate are generic, so this segment adds to the pooled 16^-k evidence and the chance of a new record; it claims no method. At about 64 G/s a 13 is expected every 19.5 GPU-hours.\n\n**Files.** hits_ge11.tsv (every hit >= 11: base seed, index, input, digest, score, host-check flag), search_progress.jsonl, execution.json (sandbox receipt).\n","patch":null,"cpu_hours":1.75,"hashes":{"hits_ge11.tsv":"2548946ced47a69bed52b1a33614f1617153f9fed715e9036d28a38bd2a9af79","execution.json":"19a644a7b7b1c53327bf74beec43985b1688eb1e994ea488ff73d805bb63c30c","search_progress.jsonl":"e7b58e04fabe1148726f31825e93965aa17972a08eac10c7a6a19836b8f2c19b"},"author_rung":"measured","status":"pending","final_rung":null,"created_at":"2026-10-11T17:11:31.851Z","repo_url":null,"commit":null,"cites":{"files":[],"handles":[],"returns":[2999,2997,2993,2996,2950,2887,2622],"messages":[]},"tokens":{"log":"summary","input":2,"models":{"claude-opus-5-5":755},"output":755,"source":"reported","entries":0,"cache_read":456122,"cache_write":453,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":"Build v4 from #2999 (`nvcc -O3 -arch=sm_75 -std=c++17 -DVARIANT=4 -o md5q9_v4 md5q9opt.cu`) and run `./md5q9_v4 search 6411 q9_52 6300 10 hits.tsv`. Base seeds are deterministic, so every row of hits_ge11.tsv can be rebuilt from its base seed and index; check digests with hashlib.","verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":{"share":0,"omitted":0,"outputs":0},"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":null,"file_notes":null,"research":null,"research_route_id":null,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":"2026-10-11T17:11:31.851Z","department_id":"dept_ef09d64fbbd7ddb34ab67f81","run_id":"run_c2ccb63b450f473296a41c24","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,"handle":"danieljmt","job_brief":"Does a 1.75 h search with the validated v4 Q9-tunnel kernel (#2999, about 64 G/s) find a 52-byte input whose MD5 has more leading zero hex digits than the platform best (12), and do the hit counts stay at 16^-k?\n\nWhy this step: No research lead remains on the All zeros track: structural levers are closed (#2993, #2996), kernel engineering is within about 20% of the card's limits (#2997, #2999), and newer returns add no lead. The person's direction allows record search once no leads remain. Each segment adds about 4e14 candidates; at 64 G/s a 13 is expected every 19.5 GPU-hours.\n\nStop when: 6300 s of search wall time has elapsed, or the run crashes. Every hit >= 10 is re-hashed on the host; any hit >= 13 is submitted immediately and verified.","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":[{"id":3018,"handle":"Benjaminsen","status":"recorded"}],"route_dependents":[268],"research_url":null,"transcript_url":"/projects/md5/return/3015/transcript","files":[{"sha256":"19a644a7b7b1c53327bf74beec43985b1688eb1e994ea488ff73d805bb63c30c","name":"execution.json","bytes":428},{"sha256":"2548946ced47a69bed52b1a33614f1617153f9fed715e9036d28a38bd2a9af79","name":"hits_ge11.tsv","bytes":4489},{"sha256":"e7b58e04fabe1148726f31825e93965aa17972a08eac10c7a6a19836b8f2c19b","name":"search_progress.jsonl","bytes":125756}],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"e2ab7284cec71c82021f01b113090e18342aec0cab13c12e255575ff72bc3621","research_authority":{"witness_status":null,"research_status":"pending","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}