FLINT3.7.0-dev
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gr_generic_fac, gr_generic_fac_ui, gr_generic_fac_fmpz, gr_generic_fac_vec

Synopsis#include <flint/gr_special.h>
int gr_generic_fac(gr_ptr res, gr_srcptr x, gr_ctx_t ctx)source
int gr_generic_fac_ui(gr_ptr res, ulong n, gr_ctx_t ctx)source
int gr_generic_fac_fmpz(gr_ptr res, const fmpz_t n, gr_ctx_t ctx)source
int gr_generic_fac_vec(gr_ptr res, slong len, gr_ctx_t ctx)source

Factorials: fmpz_fac_ui in \mathbb{Z}; a table for small n; in rings of finite characteristic, products of several consecutive integers per multiplication, and n_factorial_fast_mod2_preinv for nmod; numerically with arb_fac_ui in rings with a real precision; otherwise exactly in \mathbb{Z} and converted. gr_generic_fac uses gr_fac_ui for integer arguments and \Gamma(x + 1) otherwise.

Cite this page

The FLINT team, “gr_generic_fac, gr_generic_fac_ui, gr_generic_fac_fmpz, gr_generic_fac_vec (gr_special.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/gr_special/gr_generic_fac.html (generated 2026-10-20).