Mine

    public bigInteger test( bigInteger other ) {
    	
    	bigInteger product = new bigInteger(0);
    	
    	for (bigInteger x = new bigInteger(0); !x.equals(this); x = x.add(new bigInteger(1))) {
    		product.add(other);
    	}
    	
    	System.out.println("test"); // this doesn't even print. it hangs
    	
    	return product;
    }