Why does not my program is not running?

[anonymous2 via Digitalmars-d-learn]

On Thursday, 20 August 2015 at 21:11:07 UTC, anonymous wrote:
> I severely limited the range of integer. I don't know off the 
> top of my head how large you can make it without hitting 
> overflow.
>
> I removed the file writing, because I'm not sure if you want to 
> write it only when it doesn't exist, or only overwrite when it 
> does exist.

with integer == 66 the factorial overflows and becomes 0 (on my 
machine) => integer division by 0...
The overflow happens at lower values, too.