Thirteen Million Lines No One Will Read
The way they pulled this off is wild, buckle up. A mathematician holds a five-year grant to formalise Fermat's Last Theorem. It has been done for him in eleven days, and he says the result "tells us nothing about mathematics" as dozens of Claude agents wrote 13 million lines of Lean code and proved 30,300 intermediate theorems. Anthropic published the first complete computer-checked formalization on September 4, 2026, a job the mathematical community had expected to take years of coordinated human effort, after…