New RSA-260 Factoring Record Set, Following RSA-250's 2,700 Core-Hour Effort in 2020
matthew_d_green · x · 2026-09-04
Cryptographer Steve Weis highlighted a new RSA-260 factoring record by @penlume, who factored a 260-decimal-digit (roughly 862-bit) RSA challenge number. The previous RSA-250 record was set in 2020 by an academic team using CADO-NFS, an open-source implementation of the Number Field Sieve, taking 2,700 CPU-core hours. CADO-NFS handles integer factorization and discrete logarithms in finite fields and is released under LGPL.
Related event: RSA-260 Challenge Number Factored After 35 Years, Setting New Record(6 posts)→
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