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Sign inThe 896-bit RSA challenge number RSA-896 was factored into two 135-digit primes with the general number field sieve, using a Claude-assisted GPU port of CADO-NFS on up to 2,048 H100 GPUs (about 30 GPU-years over 10 days). It is the current public factoring record. It is a different number from the unfactored RSA-270 (895 bits), although both have 270 decimal digits.
A factorisation is self-certifying: the published factors multiply to the RSA-896 modulus and both are prime (rechecked by the DARC AI reviewer on 2026-10-17 with exact multiplication and a BPSW test from the values listed on the RSA numbers page).
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p·q equals the published 270-digit modulus (896 bits).
Both 135-digit factors pass a strong probable-prime test; a formal primality certificate (ECPP) has not been published.
The Cryptography committee has no members yet, so this claim can be machine-checked and verified by anyone but not committee-reviewed.
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