Claude formalizes Fermat's Last Theorem in 13M-line Lean proof, a first
littmath · x · 2026-09-05
Anthropic says Claude completed the first full formalization of Fermat's Last Theorem last month, turning Wiles' 1995 proof into a machine-verifiable Lean proof — over 13 million lines of code and the largest Lean proof ever, formalizing 29,000+ supporting theorems. Mathematicians call it conclusive proof that autoformalization of arbitrarily complex math is here to stay.
Related event: Claude Produces First Formalized Proof of Fermat's Last Theorem in 11 Days(52 posts)→
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