Math::GMPq is a bigrational module utilising the GNU MP (GMP) library. Basically this module simply wraps all of the mpq rational functions provided by that library. See the Math::GMPq test suite for some examples of usage. IMPORTANT: If your perl was built with '-Duse64bitint' you need to assign all integers larger than 52-bit in a 'use integer;' block. Failure to do so can result in the creation of the variable as an NV (rather than an IV) - with a resultant loss of precision. WWW: http://search.cpan.org/dist/Math-GMPq/