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

AI formalizes 350-year-old math problem in 11 days, writing longest proof ever

By · Published September 7, 2026  08:02 UTC · Updated September 8, 2026  00:27 UTC

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📍 The outcome

This achievement marked a significant milestone in mathematics, as the proof totals over 13 million lines of code. The formalization of Fermat's Last Theorem has been widely reported and acknowledged in the scientific community.

Epilogue added 49d ago, after coverage quieted.

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⚡ Executive Intelligence Takeaways Corroborated across 5 independent newsrooms
  • Velocity & Diffusion: Coverage exploded across 5 distinct news outlets with 5 published articles, achieving a live velocity of 3.
  • Primary Driver: AI formalizes 350-year-old math problem in 11 days, writing longest proof ever
  • Predictive Outlook: Archynetys algorithmic models forecast this story will fade from trending status over the next 24 hours.
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Fermat's Last Theorem has been formalized by AI agents in just 11 days, a task that would take humans years. According to Anthropic, the AI system Claude was used to formalize the proof, which totals over 13 million lines of code. The stakes were high for mathematicians, who have been trying to solve the problem for centuries.

Anthropic is the company behind Claude, and their formalization of Fermat's Last Theorem is a significant breakthrough. The company's own blog post, Formalizing Fermat's Last Theorem, provides more details on the process and the implications of this achievement. Inshorts notes that the formalization of the theorem would have taken humans years to accomplish.

While this achievement is a major milestone, it also raises questions about the role of AI in mathematics. The proof itself, which totals over 13 million lines of code, is a massive undertaking that would be difficult for humans to comprehend, let alone verify.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: all claims supported by sources Updated 50d ago.

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Answered

What is Fermat's Last Theorem?

Fermat's Last Theorem is a 350-year-old math problem that was formalized by AI agents in 11 days

How long did it take the AI to formalize the proof?

The AI system Claude formalized the proof in 11 days

How long would it have taken humans to formalize the proof?

According to Inshorts, it would have taken humans years to accomplish

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Topics

AI mathematics Fermat's Last Theorem Anthropic Claude

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