Extend and optimize Boost.Multiprecision to higher precision of thousands of bits or more.

From: Shubham Agarwal (shubhamagarwal3210_at_[hidden])
Date: 2020-02-20 20:17:01

Hello, I read the documentation for the Boots.Multiprecision and found it
interesting, and I'M willing to work on this for Gsoc.
could you please help me to get started.