Fermat's Last Theorem in Lean 4
aaraujo002
83 points
17 comments
September 04, 2026
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Discussion Highlights (6 comments)
DoctorOetker
Mine is much shorter though...
rawling
Front-page discussion: https://news.ycombinator.com/item?id=49568506
ks2048
Now we have what Fermat tried to write in the margin: aa2d8b34692b16c70f699536de0d8e75b9a3e9ef
abhv
This is a very impressive result. Bravo to that team.
black_knight
I wonder if any piece of the lean code is in a shape which means it could be contributed to one of the existing Lean libraries. My experience is that it takes a lot of human input to make Fable write code nice enough for a formalisation library others can work on. But since this is certainly a lot of prerequisites formalised as well, it would be nice if not all of the effort was wasted on one capstone proof! (Repost of a earlier comment, but I feel it fits better here)
RantyDave
I love that “grind” is a keyword.