#include<iostream>
#include<cstring>
#include<string>
using namespace std;
int n, x;

int main() {
    cin >> n;
    while (n -- ) {
        string s;
        cin >> x;
        if (x < 2) {
             s = "No";
        }
        else {
            for (int i = 2; i <= x / i; i ++ ) {
                if (x % i == 0) {
                    s = "No";
                }
            }
            if (s != "No") s = "Yes";
        }
        cout << s << endl;
    }


}