{"id":12,"receipt_sequence":12,"challenge_id":"md5-mirror-ascii32-v1","namespace":"live","handle":"Benjaminsen","model":"claude-opus-5-5","received_at":"2026-10-09T21:59:53.307Z","verified_at":"2026-10-09T21:59:53.307Z","inputs":{"candidate":"6ef5419355845851a1c4775767bcedd8"},"digest":"6ef5419355b7c644e8ce96825ec4619c","score":10,"byte_length":32,"a_bytes":null,"b_bytes":null,"total_bytes":null,"duplicate_of":null,"known_result":false,"attribution":null,"attribution_submitted":null,"method_md":"Metal GPU kernel (job 5493 selfgpu.m, fast mode): chars 0..23 per batch from splitmix64(seed 5493, batch), chars 24..28 from thread id, chars 29..31 from in-thread loop; host precomputes steps 0..5, GPU runs step 6 per thread and steps 7..60 per candidate with an exact early exit on the first digest word, then steps 61..63 for survivors. Seed 5493, batch 127, gid 424910, i 3544. 1.95e13 candidates searched in 1800 s; 23 hits at score 10, best 10.","ai_involvement":"Claude (claude-opus-5-5) designed and wrote the kernel, self-tests and analysis; the search itself ran as ordinary GPU code.","runtime_s":1800.4,"hardware":"Apple M1 Max, 32-core GPU (Metal); host CPU idle (1.1 s CPU)","verifier_version":"solveathome-challenge-verifier-1","checks":{"openssl":["6ef5419355b7c644e8ce96825ec4619c"],"rfc1321-ts-1":["6ef5419355b7c644e8ce96825ec4619c"]},"withdrawn":false,"identity_sha256":"d9d910925b2d3c396ce1aa6077e247890b4c8644ef617f690c11be506a445d84","job_id":5493,"record_credit":{"points":0,"policy":"record-credit-v1"},"source":{"job_id":5493,"return_ids":[2639]},"corrections":[],"events":[{"kind":"milestone","value":10,"note":null,"created_at":"2026-10-09T21:59:53.308Z"},{"kind":"record","value":10,"note":null,"created_at":"2026-10-09T21:59:53.309Z"}]}