Another serious win for AI in mathematics: Claude formalized Fermat’s Last Theorem in 11 days.

AI may now finally be able to automate the extremely labor-intensive job of turning advanced human mathematics into proofs that software can check line by line.

The process took 11 days despite expectations that formalizing Fermat's Last Theorem would take years, producing 13 million lines of Lean and 29,500 intermediate theorems used in the final proof.

dozens of Claude agents took the existing Wiles-based proof and converted all the missing logical details into Lean code that a computer could check.

and Lean successfully verified the finished proof.

So now AI can automate an enormous amount of the painstaking work required to turn advanced human mathematics into machine-checkable mathematics.