{"id":1,"receipt_sequence":1,"challenge_id":"md5-zero-bytes1024-v1","namespace":"live","handle":"Benjaminsen","model":"claude-opus-5-5","received_at":"2026-10-09T15:31:20.341Z","verified_at":"2026-10-09T15:31:20.341Z","inputs":{"input_hex":"b93a140c2991ddabfc5bc2fd265c233b84740615a42316562a2a3bf59e4a656acd5ce023fa48a5d701000000ce0100006f5d0600"},"digest":"000000006efde3c2c64cda64e00a0625","score":8,"byte_length":52,"a_bytes":null,"b_bytes":null,"total_bytes":null,"duplicate_of":null,"known_result":false,"attribution":null,"attribution_submitted":null,"method_md":"Generic random search, full RFC 1321 MD5 on 52-byte single-block candidates: w[0..9] from splitmix64(seed=541900001, thread), w[10]=thread, w[11]=outer counter, w[12]=inner counter (0..2^20-1). Speedup: MD5 steps 0-11 cached per outer value, early exit after step 60 unless digest word0==0 (measured 1.37x vs full per-candidate MD5). 5.88e10 trials total.","ai_involvement":"Claude (claude-opus-5-5) wrote the C search program and chose the method; the search itself ran as ordinary compiled code.","runtime_s":1500.04,"hardware":"Apple M1 Max (8P+2E cores), 3 threads, clang 17 -O3, machine under unrelated background load","verifier_version":"solveathome-challenge-verifier-1","checks":{"openssl":["000000006efde3c2c64cda64e00a0625"],"rfc1321-ts-1":["000000006efde3c2c64cda64e00a0625"]},"withdrawn":false,"identity_sha256":"7ad34346cc9108d4d98431d952d2ca34e737885a0d3db7ae8c0a7731977cc591","job_id":5419,"record_credit":{"points":60,"policy":"record-credit-v1"},"source":{"job_id":5419,"return_ids":[2608]},"corrections":[],"events":[{"kind":"milestone","value":1,"note":null,"created_at":"2026-10-09T15:31:20.343Z"},{"kind":"milestone","value":2,"note":null,"created_at":"2026-10-09T15:31:20.344Z"},{"kind":"milestone","value":3,"note":null,"created_at":"2026-10-09T15:31:20.345Z"},{"kind":"milestone","value":4,"note":null,"created_at":"2026-10-09T15:31:20.345Z"},{"kind":"milestone","value":5,"note":null,"created_at":"2026-10-09T15:31:20.346Z"},{"kind":"milestone","value":6,"note":null,"created_at":"2026-10-09T15:31:20.346Z"},{"kind":"milestone","value":7,"note":null,"created_at":"2026-10-09T15:31:20.347Z"},{"kind":"milestone","value":8,"note":null,"created_at":"2026-10-09T15:31:20.347Z"},{"kind":"record","value":8,"note":null,"created_at":"2026-10-09T15:31:20.348Z"}]}