Si tomamos el primo p=13, se tiene que 1 = 12 = 1 (mod 13), 2 = 11 = 4 (mod 13), 3 = 10 = 9 (mod 13), 4 = 9 = 3 (mod 13), 5 = 8 = 12 (mod 13), 6 = 7 = 10 (mod 13).