任意精度計算のソフトを見ていたら２つあったので紹介

１． PARI/GP

'http://pari.math.u-bordeaux.fr/

PARI/GP is a widely used computer algebra system designed for fast computations in number theory (factorizations, algebraic number theory, elliptic curves…), but also contains a large number of other useful functions to compute with mathema tical entities such as matrices, polynomials, power series, algebraic numbers etc., and a lot of transcendental functions.
( cited from http://rosettacode.org/wiki/Category:PARI/GP)

説明として参考にさせていただいた
'www.sci.u-toyama.ac.jp/~iwao/pari-gp/hokuriku-nt-06-july.pdf

2. sage

'http://www.sagemath.org/

virtual boxにうまくinstallできなかったので、centos6.5にソースからinstallした。なお、sage-7.0はコンパイルがエラーになったので、sage-6.10をinstallした

'# yum update
'# yum install gcc-gfortran libgfortran

'# wget http://ftp.tsukuba.wide.ad.jp/software/sage/src/sage-6.10.tar.gz
'# tar axvf sage-6.10.tar.gz -C /usr/local/src/
'# ls /usr/local/src
'# chown -R username /usr/local/src/sage-6.10/
~~~~
'# exit

'$ cd /usr/local/src/sage-6.10
'$ make

'$ ./sage
'# cp /usr/local/src/sage-6.10/sage /usr/local/bin
'# nano /usr/local/bin/sage

'# Set SAGE_ROOT to the location of the sage install.
SAGE_ROOT=”/usr/local/src/sage-6.10″

'# chmod a+rX -R /usr/local/src/sage-6.10