# Fermat's Last Theorem formalization

Anthropic had 1,000 agents running an early version of Claude Fable 5.2 redo the formalization of Fermat's Last Theorem without the Prove2Me platform and without a researcher directing the work, coordinating only through Git and a shared SQL database. The team finished in 28.7 hours, using about one-third the output tokens of the earlier formalization, which took a researcher and dozens of agents 11 days, and wrote a proof about one-seventh as long. The authors call it a toy experiment suggesting such agent teams can accomplish long-horizon goals within carefully designed safety boundaries.

Anthropic had 1,000 agents running an early version of Claude Fable 5.2 redo the formalization of Fermat's Last Theorem without the Prove2Me platform and without a researcher directing the work, coordinating only through Git and a shared SQL database. The team finished in 28.7 hours, using about one-third the output tokens of the earlier formalization, which took a researcher and dozens of agents 11 days, and wrote a proof about one-seventh as long. The authors call it a toy experiment suggesting such agent teams can accomplish long-horizon goals within carefully designed safety boundaries.