Science

Unsolved Problems in Mathematics

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Source:Wikipedia
Updated:2/22/2026
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Name
List
Number ofproblems
Number unsolved or incompletely solved
Proposed by
Proposedin
Hilbert's problems
Hilbert's problems2313David Hilbert1,900
Landau's problems
Landau's problems44Edmund Landau1,912
Taniyama's problems
Taniyama's problems36Yutaka Taniyama1,955
Thurston's 24 questions
Thurston's 24 questions242William Thurston1,982
Smale's problems
Smale's problems1814Stephen Smale1,998
Millennium Prize Problems
Millennium Prize Problems76Clay Mathematics Institute2,000
Simon problems
Simon problems15< 12Barry Simon2,000
DARPA's math challenges
DARPA's math challenges23DARPA2,007
Erdős's problems
Erdős's problems> 1179691Paul ErdősOver six decades of Erdős' career, from the 1930s to 1990s

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