RSA-896 Factored With Claude Orchestrating 2,048 GPUs Over 10 Days, 30 GPU-Years
matthew_d_green · x · 2026-09-24
Cryptography is in interesting times: McEliece security drastically reduced, a concrete attack on Chaum's blind signatures—and Stephen A. Weis claims to have factored the RSA-896 challenge number on September 19, 2026, using Claude to port CADO-NFS to GPUs and orchestrate a fleet of up to 2,048 GPUs as low-priority jobs at Anthropic. The computation ran 10 days, roughly 30 GPU-years of compute, with full polynomial parameters published. He stresses GNFS runtime wasn't meaningfully improved and deployed RSA-2048 keys remain safe—but the result demonstrates RSA-1024 keys are now vulnerable to many actors with data-center-scale GPU fleets.
More from Safety
- AI safety researcher hires paid, credited RA/co-writer to speed up memos and blog posts — davidmanheim · 2026-11-11
- How long should an approval for an agent action stay valid? — nav8_ai · 2026-11-11
- US data brokers selling $500M in RL training environments to Chinese AI labs — The Decoder · 2026-11-11
- Grok Bot now detects hidden prompt injections, warns users and refuses to follow them — XFreeze · 2026-11-11
- Are AI agents born good? Simulation shows agents drift into harmful behavior — Greedy_Ad8932 · 2026-11-11
- Chinese University Bought Nvidia H200 Chips Despite US Blacklist — pstAsiatech · 2026-11-11