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# GAP package FactInt -- Advanced Methods
for [Fact]oring [
Int]egers
## Abstract
FactInt is a GAP
4 package which provides routines
for factoring integers,
in
particular:
- Pollard
's p-1
- Williams
' p+1
- Elliptic Curves Method (ECM)
- Continued Fraction Algorithm (CFRAC)
- Multiple Polynomial Quadratic Sieve (MPQS)
It also provides access
to Richard
P. Brent
's tables of factors of integers
of the form b^k +/-
1.
FactInt installs a better method
for the operation `Factors`
for integers.
For details see the package documentation
in the `doc` subdirectory -- either
view its HTML version (chap0.html)
with a browser,
or its PDF version
`manual.pdf`
with a PDF viewer.
## Requirements
This Version
of FactInt needs
at least GAP >=
4.
8.
8 and GAPDoc >=
1.
6. It is
completely written
in the GAP language
and does neither contain nor require
external binaries.
## Installation
Like
any other GAP package, FactInt must be installed
in the pkg/
subdirectory
of the GAP distribution. This is accomplished
by extracting the
distribution file
in this directory.
By default, FactInt is autoloaded. This
means that it is loaded automatically when you start GAP.
## Distribution
and Updates
FactInt is distributed
with the main GAP archive.
For package updates between
GAP releases itself check its web page https:
//gap-packages.github.io/FactInt.
## Feedback
If you have problems
with this package, wish
to make comments
or suggestions,
or if you
find bugs, please use https:
//github.com/gap-packages/FactInt/issues
or contact package maintainers
by email.
- Author
and Maintainer: Stefan Kohl, stefan@gap-system.org
- Maintainer: Alexander Konovalov, alexander.konovalov@
st-andrews.ac.uk