<t>Said another way, since 3 is prime, akki's statement would be true for any p such that p is not divisible by 3. Said in terms of moduli:If p <> 0 (mod 3), then either a.) p = 1 (mod 3) or b.) p = 2 (mod 3)In the case of a, then p - 1 = 0 (mod 3)In the case of b, then p + 1 = 3 = 0 (mod 3)Pardon a...