Is not complex at all, if you can't multiply two prime number and do subtraction probably you should reconsider your skills. If people were able to do that in

Is not complex at all, if you can't multiply two prime number and do subtraction probably you should reconsider your skills. If people were able to do that in 15th century by hand I don't see how who really needs it couldn't. Is just the needs were different, but is not complicated