I am going to be rewriting/having rewritten an app that is currently done in VB6. the App deals with large numbers as in 700 digits. none of the numbers have decimals.
the App has to be able to do "basic math" on these numbers (add, subtract, divide, multiply)
on the division I need my result to be in the form of 2 integers 1 being the result the other being the remainder.
very little of the data will be written to a file.

my main concern if going to be run speed. I am not worried about development speed or the fact that I will need to learn/buy a new language.

I look forward to your feedback on this.