---
title: Unsolved problems in mathematics
date: "2000-09-01T12:00:00Z"
categories:
  - links
wp_id: 2082
description: 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.
keywords: [hilbert's problems, riemann hypothesis, millennium prize problems, clay mathematics institute, unsolved problems, david hilbert]
---

In 1900, David Hilbert outlined [23 unsolved problems in mathematics](http://aleph0.clarku.edu/~djoyce/hilbert/problems.html). Many of these have been solved today, with the notable [exception of the Riemann Hypothesis](http://www.tbtf.com/blog/2000-08-13.html#9). Today, if we [solve any of these](http://www.claymath.org/prize_problems/), we get $1 million.