#include <bits/stdc++.h>
using namespace std;

int GCD(int A, int B) {
    if (B == 0) return A;
    else return GCD(B, A % B);
}

int main() {
    long long N, K; cin >> N >> K;
    for (long long i = 0; i < N; i++) {
        long long A; cin >> A;
        K /= GCD(K, A);
    }
    if (K == 1) cout << "YES" << endl;
    else cout << "NO" << endl;
}