lol.java

import java.math.BigInteger;

public class Test {

    public static void main(String[] args) {
        BigInteger integer = new BigInteger("15465347049748408180402050551405372385300458901874153987195606642192077081674726470827949979631079014102900173229117045997489671500506945449681040725068819");
        BigInteger two = new BigInteger("2");
        for (BigInteger i = new BigInteger("2"); i.compareTo(integer) < 0; i = i.add(two)) {
            if(isPrime(i)) {
                if (integer.remainder(i).compareTo(BigInteger.ZERO) == 0) {
                    System.out.println(i);
                }
            }
        }
    }

    public static boolean isPrime(BigInteger integer) {
        if(integer.remainder(new BigInteger("2")).compareTo(BigInteger.ZERO) == 0 || integer.remainder(new BigInteger("3")).compareTo(BigInteger.ZERO) == 0) {
            return false;
        }
        BigInteger siz = new BigInteger("6");
        for(BigInteger i = new BigInteger("6"); i.pow(2).compareTo(integer) < 0; i = i.add(siz)) {
            if(integer.remainder(i.subtract(BigInteger.ONE)).compareTo(BigInteger.ZERO) == 0 ||
                    integer.remainder(i.add(BigInteger.ONE)).compareTo(BigInteger.ZERO) == 0) {
                return false;
            }
        }
        return true;
    }

}