Solving 29 = x³+ y³+ z³ is easy (29 = 3³ + 1³ + 1³). Solving 33 = x³ + y³ + z³ has confounded number theorists for a very long time. As far back as 1955, they've been using computers to grind away at a solution. This week, University of Bristol mathematician Andrew Booker's computer program solved it after three weeks of number crunching.