// Online C++ compiler to run C++ program online
#include <iostream>
using namespace std;
int main() {
     int i,n,count=0;
     for (n=2;n<10000000;n++){
         for (i=2;i<=n/2;i++){
             if (n%i==0){
                 break;
             }
             else{
                 if (i==n/2){
                     count++;
                     if (count == 6){
                         cout << n;
                     }
                 }
             }
         }
     }

    return 0;
}