Fermat’s Last Theorem was a doozy of a headscratcher that kept the very best noodles of mathematics in a whirl of frustration and despair from 1637 — when Fermat scribbled in the margin of a book that he had a solution for it (but that it was too large to fit on the side of the page) — to 1995. That’s 358 years. It was finally solved by the British mathematician, Andrew Wiles, after decades of recondite theorizing, endless computation, and manic determination (Jacob with a Numbers Angel). He beat Fermat at last.
h/a Ontario John