Permutation Of 5 Digit Number With BigInteger

i have tried permutation with big Integer in Java. it works fine upto 4 integer input say 3456 P 2345 but nothing happens in console when i type 5 digit input..here is my code

public class cvic {
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.print("Enter n and r: ");
BigInteger n = scan.nextBigInteger();
BigInteger r = scan.nextBigInteger();
System.out.println("nPr = "+fact(n).divide(fact(n.subtract(r))));

[code]....