On Sunday, 15 March 2020 at 19:07:05 UTC, ... wrote: > And if I need to create very large value, how to use GMP > library (It isn't described in that post)? You can use C bindings [1], look up examples in C and do the same in D, or use a high-level wrapper [2]. [1] https://code.dlang.org/packages/libgmp [2] https://code.dlang.org/packages/gmp-d