FMLIB Multiple precision package
David Smith's package for multi-precision arithmetic. Unlike most other packages, the components of these large numbers are stored as REALs. This is usually much more efficient than storing them as integers. This is TOMS algorithm 786.
url: www.lmu.edu/acad/personal/faculty/dmsmith2/FMLIB.h...
Large integers module
Extends the range of integers beyond 2^31. Could be useful for finding prime factors of large integers.
url: www.swcp.com/~walt/big_integers.f90
Multiple precision arithmetic
This is Richard Brent's classic MP package, which was published as TOMS algorithm 524. Contains some features such as the Bernoulli numbers, which are not available in either Smith or Bailey's packages. Dates from 1981.
url: www.netlib.org/bmp/
Multiprecision Software Directory
David Bailey's package for multiple precision, and packages for double-double (~32 dec. digits) and quad-double (~64 dec. digits) precision. The last two are in C++ with Fortran front ends.
url: www.nersc.gov/~dhbailey/mpdist/mpdist.html
Quadruple precision for the NAS FortranPlus compiler.
Using the 10-byte format available with Intel processors, this module gives about 38 decimal digits accuracy.
url: users.bigpond.net.au/amiller/NAS/quad_NAS.f90
Variable Precision Arithmetic
Lawry Schonfelder's variable precision package, using many of the new features introduced in Fortran 90.
url: www.nasoftware.co.uk/fortran-plus/vpa.html
