Authors of GNU MP (in chronological order of initial contribution)

Torbjörn Granlund	Main author
John Amanatides		Original version of mpz/pprime_p.c
Paul Zimmermann		mpn/generic/mul_fft.c, mpn/generic/dc_divrem_n.c,
			new mpz/powm.c, improved Toom3 code.
Ken Weber		mpn/generic/gcd.c mpn/generic/bdivmod.c
Bennet Yee		mpz/jacobi.c mpz/legendre.c
Andreas Schwab		mpn/m68k/lshift.S, mpn/m68k/rshift.S
Robert Harley		mpn/generic/mul_n.c, files in mpn/arm
Linus Nordberg		Random number framework, original autoconfery
Kent Boortz		MacOS 9 port
Kevin Ryde		Most x86 assembly, new autoconfery, and countless other
			things (please see the GMP manual for complete list)
Gerardo Ballabio	gmpxx.h and C++ istream input
Pedro Gimeno		Mersenne Twister random generator, other random number
			revisions
Jason Moxham		New mpz/fac_ui.c and gen-fac_ui.c

Contributors to MPIR

Brian Gladman        Windows MSVC port and intel format x86_64 code
William Hart         Build system modifications and intel format x86_64 code
Pierrick Gaudry      AMD 64 assembly support
Gonzalo Tornaria     Patches to config.guess
Jason Worth-Martin   Core 2 assembly support
Michael Abshoff      Build system patches
David Harvey         Toom 3 code
Niels Möhler         Half GCD patches (GPL version only)