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factor.m: Performance tweak to avoid division in certain cases factor.m: For large numbers where only one factor lies outside the fast first round of divisions, check if it is prime before calling primes () trying to factorize it. This is up to 8000X faster for such numbers, and for an "average" input it gives a 22% to 40% speedup over a large number of trials.
author Arun Giridhar <arungiridhar@gmail.com>
date Sat, 25 Jun 2022 16:40:36 -0400
parents 04120d65778a
children 6c1e310b2230
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To cite GNU Octave in publications use:

  John W. Eaton, David Bateman, Søren Hauberg, Rik Wehbring (2022).
  GNU Octave version 7.1.0 manual: a high-level interactive language for
  numerical computations.
  URL https://www.gnu.org/software/octave/doc/v7.1.0/

A BibTeX entry for LaTeX users is:

  @manual{,
    title     = {{GNU Octave} version 7.1.0 manual: a high-level interactive language for numerical computations},
    author    = {John W. Eaton and David Bateman and S{\o}ren Hauberg and Rik Wehbring},
    year      = {2022},
    url       = {https://www.gnu.org/software/octave/doc/v7.1.0/},
  }

We have invested a lot of time and effort in creating GNU Octave, please
cite it when using it.  See also 'citation pkgname' for citing Octave
packages.