For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Mathematician Grigori Perelman solved the Poincaré conjecture, and then rejected the $1 million prize that came with it.

NPR's Up First is the news you need to start your day. The three biggest stories of the day, with reporting and analysis from NPR News — in 10 minutes. Available weekdays at 6:30 a.m. ET, with hosts ...

The Rasmussen Reports daily Presidential Tracking Poll for Friday shows that 46% of Likely U.S. Voters approve of President Trump’s job performance. Fifty-three (53%) disapprove. The latest figures ...