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

[Guillaume Piolat via Digitalmars-d]

On Wednesday, 6 January 2016 at 21:25:45 UTC, deadalnix wrote:
> In my case, I'm interested in 160 and 256 bits integers. Using 
> BigInt seems wasteful as I know the integer size I want. Do we 
> have something like this around ?

https://github.com/d-gamedev-team/gfm/blob/master/math/gfm/math/wideint.d

public domain. Slow division. Only power-of-2 bits supported.