75450...29821 (282-digits)

This number is a prime.

                                                                          75
4504884488 3559926134 7544370319 7599305472 6674236856 6371642682 0258038260
2383411898 3700289586 7489655037 5094045606 9791328203 7450724137 5063026190
2210725598 6292722755 2429910707 3392607612 1552306935 1700952640 1573597692
2876540696 4459882330 3666072347 2298434191 2950869410 4744719811 5204429821

3^207 + 3^207 + 23^207 is prime. Note that 3*3*23 = 207. [Zucker]