Anthropic announced on September 4 that its AI system produced a machine-checked proof of Fermat's Last Theorem in the Lean proof assistant, with the artifact publicly available under Apache-2.0. The …
Lean FRO released Lean v4.33.1 on August 21 with fixes for soundness bugs found during a kernel bug hunt using OpenAI internal models, including two runtime exploits that could prove False. The collab…
On July 25, Ramana Kumar published a repository containing an AI-assisted 'disproof' of the Collatz conjecture that compiled in Lean 4 and was accepted by the independent checker nanoda, but on July 2…
Lean's kernel had a soundness bug that allowed a proof of False, exploited by an AI-assisted disproof of the Collatz conjecture; the bug was fixed within an hour of the report. The Lean development te…