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AI Just Solved a 350-Year-Old Math Problem By Writing the Longest Proof Ever

MonitoringAI & TechOtherFirst tracked 2026-09-05Last changed 2026-09-05

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Anthropic's Claude AI independently produced the longest formal proof ever, solving Fermat's Last Theorem in 11 days, a feat that a human-led project has not yet completed.

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  1. #01
    Initial2026-09-05 13:01 · publication time

    AI Just Solved a 350-Year-Old Math Problem By Writing the Longest Proof Ever

    Anthropic's Claude AI independently produced the longest formal proof ever, solving Fermat's Last Theorem in 11 days, a feat that a human-led project has not yet completed.

    Source evidence: Decrypt

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