def gcd(a, b):
    while min(a, b) > 0:
        a, b = max(a, b), min(a, b)
        a %= b
    return max(a, b)


(n, h), a = [[*map(int, input().split())] for _ in range(2)]
for ai in a:
    h //= gcd(h, ai)

print("YES" if abs(h) == 1 else "NO")