I was thinking, what would be wrong with making the 200 digit number 200-1 digit numbers and then applying math to those digits... what math did you want to do anyhow? Now besides the problems that I am gonna get hoarded(sp?) with... how long would it take for those 200 ints to get multiplied by a 4 digit number? Assuming that you just have to multiply and not add. That would be 800 multiplyings... wouldnt it?