#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

ULL GCD(ULL a, ULL b) { return b ? GCD(b, a % b) : a; }

int main() {
	int N; cin >> N;
	ULL H; cin >> H;
	rep(I, N) {
		ULL a; cin >> a;
		ULL g = GCD(H, a);
		H /= g;
	}
	if (H == 1) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0;
}