finding MSB ?? Best way or is there a function?

[Kevin Ryde]

Ernst Berg <ernst_berg at sbcglobal.net> writes:
>
> I have been looking for a way to find the MSB of mpz_t
> in GMP.

mpz_sizeinbase(z,2) is what you want (for a positive number at least).

I'll add an index entry to the manual.