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Math::BigInt::GMP - backend library for Math::BigInt etc. based on GMP


    # to use it with Math::BigInt
    use Math::BigInt lib => 'GMP';

    # to use it with Math::BigFloat
    use Math::BigFloat lib => 'GMP';

    # to use it with Math::BigRat
    use Math::BigRat lib => 'GMP';


Math::BigInt::GMP is a backend library for Math::BigInt, Math::BigFloat, Math::BigRat and related modules.

Math::BigInt::GMP provides support for big integer calculations by means of the GMP C library. See for more information about the GMP library.

Math::BigInt::GMP no longer uses Math::GMP, but provides its own XS layer to access the GMP C library. This cuts out another (Perl subroutine) layer and also reduces the memory footprint.

Math::BigInt::GMP inherits from Math::BigInt::Lib.


$str = gmp_version();

Returns the underlying GMP library's version as a string, e.g., 6.2.1.


Please report any bugs or feature requests to bug-math-bigint-gmp at, or through the web interface at (requires login). We will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


After installing, you can find documentation for this module with the perldoc command.

    perldoc Math::BigInt::GMP

You can also look for information at:


RT: CPAN's request tracker


CPAN Testers Matrix


This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.


Tels <> in 2001-2007.

Thanks to Chip Turner (CHIPT on CPAN) for providing Math::GMP, which was inspiring my work.

Maintained by Peter John Acklam <> 2010-2021.

gmp_version() provided by FGasper on GitHub.


Math::BigInt::Lib for a description of the API.

Alternative libraries Math::BigInt::Calc, Math::BigInt::FastCalc, and Math::BigInt::Pari.

Some of the modules that use these libraries Math::BigInt, Math::BigFloat, and Math::BigRat.