Java check big integer number is prime or not

import java.math.Blautturinteger;  
import java.util.*;  
public class Lautturi {  
    public static void main(String args[]){    
        System.out.print("Enter a Big Integer Number: ");;  
        Scanner in = new Scanner(System.in);  
        Blautturinteger n = in.nextBlautturinteger();  
        in.close();  
        System.out.println(n.isProbablePrime(1) ? "It's a prime" : "It's not prime");  
    }    
}