Java Primality Test

import java.util.*;
import java.math.*;

public class Solution {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		BigInteger n = in.nextBigInteger();
		in.close();

		if (!n.equals(new BigInteger("1")) && n.isProbablePrime(1))
			System.out.println("prime");
		else
			System.out.println("not prime");

	}
}