https://isocpp.org/files/papers/D4444R0.html

Hey folks! Matt Borland, Christopher Kormanyos, and I are working on
bringing arbitrary-precision integers to C++29. We now have a D4444R0 draft
of a paper that should be in the next mailing.

We could really use some feedback so that the published R0 is as polished
as possible. Any thoughts on the paper and on the reference implementation
are greatly appreciated. (https://github.com/eisenwave/std-big-int/)

It would also be very helpful if you tested out whether our big_int
implementation works for you. We're in need of some real deployment
experience. If you're currently using Boost.Multiprecision, the library
should be a drop-in replacement for cpp_int for the most part.


Yours
Jan