import java.util.*;
import java.io.*;
public class Driver {
public static void main (String[] args){
Factorial l;
l = new Factorial();
System.out.println(l.fact(10));
System.out.println(l.fact(1));
System.out.println(l.fact2(5));
System.out.println (l.gcd(68,16));
System.out.println (l.gcd2(68,16));
System.out.println (l.isPrime(27751));
}
}