`nmod_inv`

Synopsis#include <flint/nmod.h>

ulong nmod_inv(ulong a, nmod_t mod)source

Returns $a^{-1} \bmod n$ for reduced $a$ . Throws an exception if $\gcd(a, n) \ne 1$ .

Guides#

Basic arithmetic modulo n

Cite this page

The FLINT team, “nmod_inv (nmod.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/nmod/nmod_inv.html (generated 2026-11-02).

@misc{flint-doc-nmod-nmod-inv,
  author       = {{The FLINT team}},
  title        = {{nmod\_inv (nmod.h)}},
  howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
  year         = {2026},
  url          = {https://flintlib.org/doc/nmod/nmod_inv.html},
  note         = {Generated 2026-11-02}
}

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