Open problems

The seven Millennium Prize Problems set by the Clay Mathematics Institute are:

• P versus NP
• The Hodge Conjecture
• The Poincaré Conjecture
• The Riemann Hypothesis
• Yang-Mills Existence and Mass Gap
• Navier-Stokes Existence and Smoothness
• The Birch and Swinnerton-Dyer Conjecture

Other still-unsolved problems:

• Goldbach's conjecture
• Twin prime conjecture
• Hilbert's sixteenth problem
• please add more to this list

See also those problems listed as conjectures.

Problems solved recently:

• Kepler's conjecture 1998
• Fermat's last theorem 1994
• Four color theorem 1977

See also: Hilbert's 23 problems, Timeline of mathematics

External links

• http://www.math.unibas.ch/~winkel/problem.html