In the year 2000, the *Clay Mathematics Institute* He announced that he would pay the $ 1 million prize to every mathematician who could solve some of the so-called "millennium problems." These are seven problems created over the centuries that had never been solved.

After ten years, Russian Grigori Perelman solved one of them, the “Poincaré Conjecture”, a series of abstract calculations involving three-dimensional spheres. He has declined the payment and so far is still the only one to cross out a problem on the list.

If you want to try to pocket the prize, follow the list of "millennium problems".

- P versus NP
- Hodge's conjecture
- The Poincaré Conjecture
*(solved by Grigori Perelman)* - Riemann's hypothesis
- Yang-Mills existence and mass failure
- The existence and smoothness of Navier-Stokes
- The Birch and Swinnerton-Dyer Conjecture