Is there a good lib out there to handle large integer of know size ?

[Era Scarecrow via Digitalmars-d]

On Sunday, 11 June 2017 at 18:01:41 UTC, Era Scarecrow wrote:
>  Anyways, here's how it is currently, most features are 
> avaliable, need more tests and find occurrences where it 
> doesn't work.

  I should probably mention that's only for UCent, Cent isn't 
fully tested or implemented yet.