Claude Delivers the First Machine-Verified Proof of Fermat's Last Theorem

Rickler Feed (@rickler_feed), Sep 7, 2026, 09:30 UTC

Claude Delivers the First Machine-Verified Proof of Fermat's Last Theorem Anthropic's Claude has produced the first complete, computer-checked proof of Fermat's Last Theorem, working largely autonomously over 11 days to write the formalization in the Lean programming language. It is a milestone the mathematical community had expected to take years. Fermat's Last Theorem, stated in 1637, resisted proof for over 350 years until Andrew Wiles published a 129-page solution in 1995 that itself took months to verify. Turning that reasoning into a form a computer can check line by line was the open…

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