In April 2013, a little-known University of New Hampshire lecturer proved something that rocked the mathematical world. Yitang Zhang had cracked the “unsolvable math problem” – the Twin Prime Conjecture. His insight into one of the great challenges of number theory is beautifully portrayed in the new film Counting From Infinity. The Commonwealth Club invites numbers lovers to view a special screening of the documentary at Palo Alto’s Cubberley Community Center, hosted by Stanford mathematician Keith Devlin. As NPR’s resident “Math Guy,” Devlin’s a wiz at making facts and figures fun. He’ll provide expert commentary on the film and Zhang’s findings.