Java tutorial
import java.math.BigInteger; public class Main { public static void main(String[] args) { BigInteger exponent = new BigInteger("2"); BigInteger bi1 = new BigInteger("7"); BigInteger bi2 = new BigInteger("20"); // perform modPow operation on bi1 using bi2 and exp BigInteger bi3 = bi1.modPow(exponent, bi2); System.out.println(bi3); } }