Unverified50% confidenceFactExact time
The four-color theorem is the first major theorem in the history of mathematics to be verified primarily by computer.
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50%
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Long-term
Relevance
10/9/2026
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VerifiedThe computer-assisted proof of the four-color theorem was first published by Kenneth Appel and Wolfgang Haken in 1976, requiring computer verification of 1,936 irreducible configurations, and is the first important theorem proof in the history of mathematics to essentially depend on a computer80% similarUnverifiedThe four-color theorem was verified by computer-aided proof in 1976.76% similarUnverifiedThe proofs of the four-color theorem and Kepler's conjecture both involved computer assistance, sparking philosophical discussions about whether humans truly understand these proofs.75% similarUnverifiedSeveral important theorems have been formalized in Lean, such as the four-color theorem and partial results of Fermat's Last Theorem74% similarVerifiedThe computer-assisted proof of the four color theorem in 1976 sparked years of controversy in the mathematical community because it contained extensive exhaustive computations that could not be individually verified by hand.72% similar
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