Number theorist Yitang Zhang, who went from obscurity to luminary status in 2013 for cracking a century-old question about prime numbers, now claims to have solved another. The problem is similar to — ...

“We’ve been stuck and running out of ideas on the problem for a long time, so it’s automatically exciting when anyone comes up with new insights,” said James Maynard, a mathematician at the University ...

A review of Prime Obsession: Bernhard Riemann and the Greatest Unsolved Problem in Mathematics, by John Derbyshire. With the proof of Fermat’s Last Theorem in 1994, Derbyshire says, “the Riemann ...