I had the same issue too. The code I have works but will kick the number back if it is too large. Maybe there is some other way you have to solve it?

Thanks for the response. What do you think is wrong with the code provided?

I was able to solve the code, but the server timed out a lot when running the tests. It seemed like a lot of the sample tests were working with very large numbers. Maybe that had something to do with it? Not sure.