In Pursuit of Zeta-3: The World's Most Mysterious Unsolved Math ProblemAn engrossing look at the history and importance of a centuries old but still unanswered math problem For centuries, mathematicians the world over have tried, and failed, to solve the zeta 3 problem. Math genius Leonhard Euler attempted it in the 1700s and came up short. The straightforward puzzle considers if there exists a simple symbolic formula for the following: 1+(1 2) 3+(1 3) 3+(1 4) 3+. . . . But why is this issue the sum of the reciprocals of