716407555481

This number is a prime.

                                                               71 6407555481

Michael Keith found that {1, 3, 9, 7} occurs at p = 716407555481 in the "24 Permutations Puzzle". The first 17 values of p are 53, 239, 347, 619, 3529, 3581, 6781, 10949, 23431, 72269, 176081, 960389, 6263539, 45845791, 45853453, 646488749 and 716407555481. There are currently 7 permutations that remain to be found for a complete solution.