Do you want to get $1 Million by solving one of these problems?
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The Millennium Prize Problems are seven problems in mathematics that were stated by the Clay Mathematics Institute on May 24, 2000. To date, the only Millennium Prize problem to have been solved is the Poincaré conjecture, which was solved in 2003 by the Russian mathematician Grigori Perelman.
The remaining six problems are unsolved yet. these problems are:
1. P versus NP
2. Hodge conjecture
3. Riemann hypothesis
4. Yang–Mills existence and mass gap
5. Navier–Stokes existence and smoothness
6. Birch and Swinnerton-Dyer conjecture

If you solve one of the above problems, you will get one Million dollar.