Anthropic says AI model Claude spent 11 days turning Fermat's Last Theorem into 13 million lines of code a computer can check itself.

Anthropic's Claude AI completed the first machine-checked formalization of Fermat's Last Theorem in Lean 4, verifying over 29,500 theorems

Anthropic's Claude formalized Fermat's Last Theorem in 11 days. Anthropic has the best AI model by September 2026 at 85.5% YES.