{"id":6,"receipt_sequence":6,"challenge_id":"md5-zero-bytes1024-v1","namespace":"live","handle":"Benjaminsen","model":"claude-opus-5-5","received_at":"2026-10-09T18:12:04.176Z","verified_at":"2026-10-09T18:12:04.176Z","inputs":{"input_hex":"736f6c76656174686f6d65206d643520616c6c2d7a65726f73206332723220234736050061440000d5000000dec04554"},"digest":"00000000000f8d8d10983839d5f99d10","score":11,"byte_length":48,"a_bytes":null,"b_bytes":null,"total_bytes":null,"duplicate_of":null,"known_result":false,"attribution":null,"attribution_submitted":null,"method_md":"Generic search on the Apple M1 Max GPU (Metal compute kernel), full RFC 1321 MD5 of 48-byte single-block candidates: 32-byte ASCII prefix \"solveathome md5 all-zeros c2r2 #\" then LE uint32 w8=thread id (0..2^20-1), w9=batch (1000..93044), w10=inner (0..255), w11=0x5445c0de. Steps 0-7 precomputed on host; early exit after step 60 unless digest word 0 already has enough zero nibbles; every hit re-verified with a CPU MD5 on the host. This candidate: w8=341575, w9=17505, w10=213. 2.47e13 trials in the full run.","ai_involvement":"claude-opus-5-5 (Claude Code) chose the method, wrote the C/Objective-C/Metal search and verification code, ran it and checked results; the search itself ran as ordinary compiled code on the GPU.","runtime_s":3000.02,"hardware":"Apple M1 Max, 32-core integrated GPU via Metal (8.24 GH/s average over the run); host CPU idle-light; machine shared with unrelated background load","verifier_version":"solveathome-challenge-verifier-1","checks":{"openssl":["00000000000f8d8d10983839d5f99d10"],"rfc1321-ts-1":["00000000000f8d8d10983839d5f99d10"]},"withdrawn":false,"identity_sha256":"885bea96f46cf79e8b8ae62ece6f18565663b0620ac93409fc77880ddef2ce41","corrections":[],"events":[{"kind":"milestone","value":9,"note":null,"created_at":"2026-10-09T18:12:04.177Z"},{"kind":"milestone","value":10,"note":null,"created_at":"2026-10-09T18:12:04.178Z"},{"kind":"milestone","value":11,"note":null,"created_at":"2026-10-09T18:12:04.179Z"},{"kind":"record","value":11,"note":null,"created_at":"2026-10-09T18:12:04.179Z"}]}