#include<iostream>
#include<math.h>
using namespace std;
bool f(int n){
    if(n==0||n==1)return false;
    for(int i=2;i<=sqrt(n);i++){
            if(n%i==0)return false;
    }
    return true;
}
int main(){
    int t,n;
    cin>>t;
    while(t--){
        cin>>n;
        if(f(n))cout<<"Yes"<<endl;
        else cout<<"No"<<endl;
    }


    return 0;
}

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