The man paid to prove Fermat by hand says Claude did it in 11 days

Anthropic’s AI swarm generated 13 million lines of Lean code, proving 30 300 intermediate theorems and delivering a complete, computer-checked proof of Fermat’s Last Theorem in eleven days, using about six billion output tokens (~$300 k at list price). Kevin Buzzard confirmed the formalisation faithfully follows the 1995 Darmon-Diamond-Taylor exposition and adds no new mathematical insight, but demonstrated that coordinated AI agents can formalise extensive research on the fly.