I cannot tell if you might be on a path, but the solution is much simpler...

Just checked to be sure to tell you the exact number: up to 10**100, so you might want to optimize your algo. A lot ;)

P.S.: are you by any chance the Alyona I spoke a few weeks ago on Skype to organize an event?

A better question to ask(google) would be: how to avoid using 'def'.

In any case I would consider making your code more efficient, possibly finding a patter or a better approach to do things.

Not sure about the specific error without seeing your code, of course.

Edit: ok, from your profile I would say it is definitely Python, feel free to post your code using a spoiler flag if you think it is worth it, but I would seriously restructure my solution at this point.