Largest proof in math history computer-verified: CFSG formalized in 43M lines of Lean
rickasaurus · x · 2026-10-28
Axiom announced a complete Lean auto-formalization of the Classification of Finite Simple Groups (CFSG), billed as the largest proof in mathematics history: roughly 15,000 pages across 500+ papers by 100 mathematicians, now encoded as over 43 million lines of Lean, with about 100 substantive fixes to the existing literature uncovered along the way. The accompanying graphic visualizes the proof's dependency structure by milestone, theorem, definition and certificate nodes.
Related event: Colossal Theorem Fully Formalized in Lean by AI Agents(20 posts)→
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