The Millennium Prize Problems were created by Landon T. Clay, an American businessman who founded the Clay Mathematics Institute (CMI) in Cambridge, Massachusetts, in 1998 to promote and share ...
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7 unsolved math problems still worth $1 million
The seven Millennium Prize Problems represent some of the hardest unsolved questions in mathematics, including one famously solved by Grigory Perelman, who refused the million-dollar reward.
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