Claude's Fermat Proof Passes Independent Rust Verifier: 1,052,234 Declarations, Zero Errors
imjustnewatai · x · 2026-09-05
- Claude's formal walkthrough of the existing human proof of Fermat's Last Theorem was re-verified by a second, independently written Rust verifier: 1,052,234 declarations checked including dependencies, with zero errors reported.
- Anthropic also confirmed the final theorem matches the actual Fermat statement and relies only on Lean's standard axioms — effectively turning decades of work by mathematicians and the Lean community into machine-checkable steps.
- The author envisions thousands of agents producing, checking, and building on verified proofs, so mathematical output could accumulate faster than humans can read it while remaining fully verifiable.
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