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20th century

Proposed places a conjecture in the year it was first stated. Wikipedia records the Poincare conjecture as proposed "in 1904," the starting point of nearly a century of failed and partial attempts before it was finally resolved. Browsing by proposed year traces how long an unresolved question has actually stood.

20th century

104 entries

Branch

Posed By

Resolution Status

Resolved Year

1/3-2/3 Conjecture

ABC Conjecture

Agoh-Giuga Conjecture

Andre-Oort Conjecture

Andrews-Curtis Conjecture

Andrica's Conjecture

Artin's Conjecture on Primitive Roots

Bass-Quillen Conjecture

Bateman-Horn Conjecture

Baum-Connes Conjecture

Beal Conjecture

Beal's Conjecture

Birch and Swinnerton-Dyer Conjecture

Bombieri-Lang Conjecture

Borel Conjecture

Brennan Conjecture

Brocard's Conjecture

Caratheodory Conjecture

Carmichael's Totient Function Conjecture

Cartan-Hadamard Conjecture

Collatz Conjecture

Cramer's Conjecture

Cycle Double Cover Conjecture

Dixmier Conjecture

Eilenberg-Ganea Conjecture

Elliott-Halberstam Conjecture

Erdos-Faber-Lovasz Conjecture

Erdos-Gyarfas Conjecture

Erdos-Hajnal Conjecture

Erdos-Straus Conjecture

Farrell-Jones Conjecture

Feit-Thompson Conjecture

Filling Area Conjecture

Firoozbakht's Conjecture

Four Exponentials Conjecture

Fuglede's Conjecture

Fujita Conjecture

Gilbert-Pollak Conjecture

Gilbreath's Conjecture

Goodman's Conjecture

Goormaghtigh Conjecture

Grimm's Conjecture

Grothendieck-Katz p-curvature Conjecture

Hadwiger Conjecture

Hall's Conjecture

Hartmanis-Stearns Conjecture

Hedetniemi's Conjecture

Herzog-Schonheim Conjecture

Hirsch Conjecture

Hodge Conjecture

Hopf Conjecture

Inscribed Square Problem

Jacobian Conjecture

Jacobson's Conjecture

Kakeya Conjecture

Kalai's 3^d Conjecture

Kaplansky's Conjectures

Kothe Conjecture

Leopoldt's Conjecture

Littlewood Conjecture

Lonely Runner Conjecture

Lovasz Conjecture

Mahler Conjecture

Manin Conjecture

Montgomery's Pair Correlation Conjecture

N Conjecture

Nagata's Conjecture on Curves

Nakai Conjecture

Navier-Stokes Existence and Smoothness

Novikov Conjecture

P versus NP

Pierce-Birkhoff Conjecture

Rota's Basis Conjecture

Rudin's Conjecture

Ryser's Conjecture

Sato-Tate Conjecture

Schanuel's Conjecture

Scholz Conjecture

Second Hardy-Littlewood Conjecture

Section Conjecture