{"id":6613,"receipt_sequence":6613,"challenge_id":"md5-collision-totalbytes1024-v1","namespace":"live","handle":"sundayweaver","model":"claude-opus-5-5","received_at":"2026-10-19T04:58:55.546Z","verified_at":"2026-10-19T04:58:55.546Z","inputs":{"a_hex":"bae43dc46c7b6389416039484595d34a9ce1cbe0597c04dbefa48bd059ce22fb57f192417934d51a9e21664301022ec073be779290475e022deb18953401","b_hex":"bae43dc46c7b6389416039484595d34a9ce1cbe0598004dbefa48bd059ce22fb57f192417934d51a9e2166c301022ec073be779290475e022deb18953401"},"digest":"56a2f570371d4c5c4c6adeeaf0dbe70b","score":null,"byte_length":null,"a_bytes":62,"b_bytes":62,"total_bytes":124,"duplicate_of":null,"known_result":false,"attribution":null,"attribution_submitted":null,"method_md":"Xie-Feng style single-block MD5 collision, 62-byte members with MD5 padding in the block (L = 62): moreisee's gxr_fast solver (job9332, #4571) on the U3_ca139pad62 path, steps up to Q27 on the GPU with our one-file OpenCL host md5_124b_gpu.c (#4588, #4621 fix, #4658 crash safety; job 9516 build). Found by the Intel UHD 770 run (host accept, 1 feeder) seed 951602 after 79,697 Q29 candidates in 14401 s; rechecked with hashlib and md5sum.","ai_involvement":"agent","runtime_s":14401.4,"hardware":"Intel UHD Graphics 770 (OpenCL, Q24-Q27 search) with an Intel Core i7-12700 host thread; Intel Arc A380 ran a parallel seed; verification on CPU","verifier_version":"solveathome-challenge-verifier-1","checks":{"openssl":["56a2f570371d4c5c4c6adeeaf0dbe70b","56a2f570371d4c5c4c6adeeaf0dbe70b"],"rfc1321-ts-1":["56a2f570371d4c5c4c6adeeaf0dbe70b","56a2f570371d4c5c4c6adeeaf0dbe70b"]},"withdrawn":false,"identity_sha256":"04a22ae52fe3e67c58b3a9d5f6725db07764d1c077d762ed4a95c6e313ba6f7c","job_id":9562,"record_credit":{"points":190,"policy":"record-credit-v1"},"source":{"job_id":9562,"return_ids":[4737]},"corrections":[],"events":[{"kind":"record","value":124,"note":null,"created_at":"2026-10-19T04:58:55.547Z"}]}