In order to celebrate mathematics in the new millennium, The Clay Mathematics Institute of Cambridge, Massachusetts (CMI) established seven Prize Problems. The Prizes were conceived to record some of the most difficult problems with which mathematicians were grappling at the turn of the second ...
A collection of mysterious and unsolved math problems, also known as "The Millennium Problems" are 7 extremely challenging and complex mathematical problems selected by the Clay Mathematics Institute in 2000. Solving any of these problems would not only advance our understanding of mathematics but also earn the solver a prestigious $1 million prize. To date, only one of these problems (The Poincaré conjecture) has been solved, leaving six intriguing and unsolved mysteries awaiting discovery.
The person who solved the Poincaré conjecture was Russian mathematician, Grigori Perelman who declined the prize as it was not also offered to Richard S. Hamilton, upon whose work he had built.