Millennium Prize Problems

P versus NP problem, Poincaré conjecture, Riemann hypothesis, Hodge conjecture, Navier-Stokes existence and smoothness, Birch and Swinnerton-Dyer conjecture, Ya... » 

P versus NP problem, Poincaré conjecture, Riemann hypothesis, Hodge conjecture, Navier-Stokes existence and smoothness, Birch and Swinnerton-Dyer conjecture, Yang-Mills existence and mass gap «