Question

Ho to do calculation on 32 bit computers with 2GB RAM.
When i do long number arithmetic then the programs start to give garbage value. But i want to do calculate numbers upto tens of thousands of digits.Any language is accepted.

Answer 1

Using Java’s BigInteger, executes almost instantaneously:

import java.math.BigInteger;
import java.util.Random;

public class Int10k {

    public static final void main(String[] args) {
        BigInteger  a, b, c;
        Random rnd;

        // Here I'll create two random 40,000-bit numbers (that's
        // rather more than 10,000 decimal digits) and add them
        // together. For specific numbers, you can use the
        // BigInteger(String) constructor, which creates a
        // BigInteger based on a String of digits.
        rnd = new Random();
        a = new BigInteger(40000, rnd);
        b = new BigInteger(40000, rnd);
        c = a.add(b);

        System.out.println(a);
        System.out.println("+");
        System.out.println(b);
        System.out.println("=");
        System.out.println(c);
    }
}