Science

Unsolved Problems in Mathematics

Famous unsolved problems in mathematics.

9 rows5 columns2 views0 downloadsSource: WikipediaUpdated: 2/22/2026
mathunsolvedproblemsscience
9 of 9 rows
List
Number ofproblems
Number unsolved or incompletely solved
Proposed by
Proposedin
Hilbert's problems2313David Hilbert1,900
Landau's problems44Edmund Landau1,912
Taniyama's problems36Yutaka Taniyama1,955
Thurston's 24 questions242William Thurston1,982
Smale's problems1814Stephen Smale1,998
Millennium Prize Problems76Clay Mathematics Institute2,000
Simon problems15< 12Barry Simon2,000
DARPA's math challenges23DARPA2,007
Erdős's problems> 1179691Paul ErdősOver six decades of Erdős' career, from the 1930s to 1990s
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