Any number p that is a factor of h(100)+1, leaves a remainder of (p-1) when it divides h(100).remainder(h(100)/p) = p-1.Another way of saying this is p is a prime number that is not a divisor of h(100) (B)From (A):Clearly h(100) is divisible by all prime numbers less than 50 (as h(100) is divisible by 50!).