A070669 Smallest m in range 2..n-1 such that m^4 == 1 mod n, or 1 if no such number exists.

1, 1, 2, 3, 2, 5, 6, 3, 8, 3, 10, 5, 5, 13, 2, 3, 4, 17, 18, 3, 8, 21, 22, 5, 7, 5, 26, 13, 12, 7, 30, 7, 10, 13, 6, 17, 6, 37, 5, 3, 9, 13, 42, 21, 8, 45, 46, 5, 48, 7, 4, 5, 23, 53, 12, 13, 20, 17, 58, 7, 11, 61, 8, 15, 8, 23, 66, 13, 22, 13, 70, 17, 27, 31, 7