Authors of MPFR (in chronological order of initial contribution): Guillaume Hanrot Main author Fabrice Rouillier Original version of mul_ui.c, gmp_op.c Paul Zimmermann Main author Sylvie Boldo Original version of agm.c and log.c Emmanuel Jeandel Original version of exp3.c, const_pi.c, sincos.c Mathieu Dutour asin.c, atan.c and gamma.c Vincent Lefèvre Main author David Daney Hyperbolic and inverse hyperbolic functions, base-2 and base-10 exponential and logarithm, factorial Patrick Pélissier Main author Laurent Fousse Original version of sum.c Philippe Théveny Main author Sylvain Chevillard Original version of ai.c All authors are included in the MPFR mailing-list . This is the preferred way to contact us. For further information, please look at the MPFR web page .