# phpman > perldoc > Math::BigInt::LTM

## NAME
    [Math::BigInt::LTM](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt%3A%3ALTM/markdown) - Use the libtommath library for [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) routines

## SYNOPSIS
     use [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) lib => 'LTM';

     ## See [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown) docs for usage.

## DESCRIPTION
    Provides support for big integer calculations by means of the libtommath c-library.

    *Since: CryptX-0.029*

## SEE ALSO
    [Math::BigInt](https://www.chedong.com/phpMan.php/perldoc/Math%3A%3ABigInt/markdown), <<https://github.com/libtom/libtommath>>