Anthropic posts a complete Lean 4 machine-checked proof of Fermat's Last Theorem
scaling01 · x · 2026-09-05
Anthropic has published anthropics/fermats-last-theorem on GitHub: a complete, machine-checked Lean 4 proof of Fermat's Last Theorem built on Mathlib (Lean 4.33.1; Mathlib v4.33.0 pinned by commit). The argument follows Frey, Serre, Ribet, Wiles and Taylor-Wiles. PROOF-PATH.md names each step and the Lean theorem carrying it, and the html/ folder renders the whole proof as browsable offline web pages. The repo is a research artifact — not maintained, not accepting contributions.
Related event: Claude Produces First Formalized Proof of Fermat's Last Theorem in 11 Days(52 posts)→
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