Java tutorial
//package com.java2s; //License from project: Open Source License import java.math.BigInteger; public class Main { public static boolean isGoodGaAndGb(BigInteger g_a, BigInteger p) { return !(g_a.compareTo(BigInteger.valueOf(1)) != 1 || g_a.compareTo(p.subtract(BigInteger.valueOf(1))) != -1); } }