In 1900, David Hilbert outlined 23 unsolved problems in mathematics. Many of these have been solved today, with the notable exception of the Riemann Hypothesis. Today, if we solve any of these, we get $1 million.
Unsolved problems in mathematics
Review David Hilbert’s 23 foundational mathematical problems from 1900 and the contemporary Millennium Prize Problems. While many are solved, the Riemann Hypothesis remains a major challenge with a million-dollar bounty for anyone who solves it.