import java.math.BigInteger;
import java.security.SecureRandom;
public class Main {
public static void main(String[] args) throws Exception {
int bitLength = 512; // 512 bits
SecureRandom rnd = new SecureRandom();
int certainty = 90; // 1 - 1/2(90) certainty
System.out.println("BitLength : " + bitLength);
BigInteger mod = new BigInteger(bitLength, certainty, rnd);
BigInteger exponent = BigInteger.probablePrime(bitLength, rnd);
BigInteger n = BigInteger.probablePrime(bitLength, rnd);
BigInteger result = n.modPow(exponent, mod);
System.out.println("Number ^ Exponent MOD Modulus = Result");
System.out.println("Number");
System.out.println(n);
System.out.println("Exponent");
System.out.println(exponent);
System.out.println("Modulus");
System.out.println(mod);
System.out.println("Result");
System.out.println(result);
}
}