It’s the greatest unsolved problem in mathematics. Will it ever be solved? “With a pedigree linking many of the greatest names in the field, the Riemann Hypothesis runs like a river through vast swaths of seemingly distinct mathematical territory. Andrew Wiles himself has compared a proof of this proposition to what it meant for the 18th century when a solution to the longitude problem was found. With longitude licked, explorers could navigate freely around the physical world; so too, if Riemann is resolved, mathematicians will be able to navigate more fluidly across their domain. Its import extends into areas as diverse as number theory, geometry, logic, probability theory and even quantum physics.”