This package requires one library the GNU Multiple Precision arithmetic library (libgmp) Obtain from http://gmplib.org/ or from your operating system vendor. This is a standard GNU package and comes with many Linux distributions and may be found at the web sites of other vendors that distribute free software. The licence is LGPL and source is available at http://gmplib.org/#DOWNLOAD If that doesn't work the source for GMP version 4.2.2 is available at http://www.stat.umn.edu/geyer/rcdd/gmp-4.2.2.tar.gz.