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Applied AI·September 6, 2026·1 min read

The man paid to prove Fermat by hand says Claude did it in 11 days

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Claude spinning up dozens of agents to generate 13 million lines of Lean and 30,300 intermediate proofs in 11 days is a preview of AI as a force-multiplier for formal methods, not just code autocomplete. For teams in safety-critical domains, this points toward feasible large-scale verification workflows that were previously cost-prohibitive.