Home›Number Theory›All Number TheoryBrowse ByAll Number TheoryReference and ClassificationDevelopingOpen conjectures about the integers and their properties: primes, divisibility, and equations with no known proof either way. Belongs here: number-theoretic conjectures such as the twin prime or Goldbach conjectures. Does not belong here: conjectures already proved, which are filed under the Theorems category instead.FactsAll Number TheorySourcesComments (0)Reader Challenges (0)FactsComparisonEra Of EmergenceWell-attested1800 BCE 1All Number TheoryFilter Results50 entriesBranchAllAnalysis (2)Analytic Number Theory (1)Number Theory (9)ProposedAll1742 (1)1808 (1)1849 (3)1857 (1)1859 (1)1877 (1)1895 (1)1907 (1)1917 (1)1923 (1)1927 (1)1930 (1)1936 (1)1937 (1)1948 (1)1950 (1)1957 (1)1958 (1)1960 (2)1962 (4)1965 (1)1966 (1)1968 (1)1969 (1)1970 (1)1971 (1)1973 (1)1981 (1)1982 (1)1985 (1)1986 (1)1993 (2)1994 (1)2002 (1)Posed ByAllAdrien-Marie Legendre (1)Alphonse de Polignac (2)Andrew Beal (2)Bernhard Riemann (1)Bryan Birch (2)Carl Friedrich Gauss (1)Christian Goldbach (1)David Masser (1)Ernst G. Straus (1)Joseph Oesterle (1)Lothar Collatz (1)Paul Erdos (2)Peter Swinnerton-Dyer (1)Resolution StatusAllOpen (46)Partially Resolved (3)Proven (2)Resolved YearAll1971 (1)2011 (1)2023 (1)BrowseCompareSelect all 50ABC ConjectureNumber TheoryAgoh-Giuga ConjectureNumber TheoryAgrawal's ConjectureNumber TheoryAndrica's ConjectureNumber TheoryArtin's Conjecture on Primitive RootsNumber TheoryBateman-Horn ConjectureNumber TheoryBeal ConjectureNumber TheoryBeal's ConjectureNumber TheoryBirch and Swinnerton-Dyer ConjectureNumber TheoryBirch-Tate ConjectureNumber TheoryBrocard's ConjectureNumber TheoryBrumer-Stark ConjectureNumber TheoryBunyakovsky ConjectureNumber TheoryCarmichael's Totient Function ConjectureNumber TheoryCollatz ConjectureNumber TheoryCramer's ConjectureNumber TheoryElliott-Halberstam ConjectureNumber TheoryErdos Conjecture on Arithmetic ProgressionsNumber TheoryErdos-Straus ConjectureNumber TheoryFeit-Thompson ConjectureNumber TheoryFermat-Catalan ConjectureNumber TheoryFiroozbakht's ConjectureNumber TheoryFortune's ConjectureNumber TheoryFour Exponentials ConjectureNumber TheoryGauss Circle ProblemNumber TheoryGilbreath's ConjectureNumber TheoryGoldbach ConjectureNumber TheoryGoormaghtigh ConjectureNumber TheoryGrimm's ConjectureNumber TheoryHall's ConjectureNumber TheoryKummer-Vandiver ConjectureNumber TheoryLegendre's ConjectureNumber TheoryLehmer's ConjectureNumber TheoryLemoine's ConjectureNumber TheoryLeopoldt's ConjectureNumber TheoryLittlewood ConjectureNumber TheoryMontgomery's Pair Correlation ConjectureNumber TheoryN ConjectureNumber TheoryOppermann's ConjectureNumber TheoryPolignac's ConjectureNumber TheoryRiemann HypothesisNumber TheoryRudin's ConjectureNumber TheorySato-Tate ConjectureNumber TheorySchanuel's ConjectureNumber TheorySchinzel's Hypothesis HNumber TheorySecond Hardy-Littlewood ConjectureNumber TheorySerre's Conjecture IINumber TheoryStark ConjecturesNumber TheorySzpiro's ConjectureNumber TheoryTwin Prime ConjectureNumber TheorySources1. Number Theory (Wikipedia)tier 2Wikimedia FoundationHistory sectionQuote, History sectionThe earliest historical find of an arithmetical nature is the Plimpton 322, dated c. 1800 BC.View the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.