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(gmp.info)Useful Macros and Constants

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Useful Macros and Constants
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 - Global Constant: const int mp_bits_per_limb
     The number of bits per limb.

 - Macro: __GNU_MP_VERSION
 - Macro: __GNU_MP_VERSION_MINOR
 - Macro: __GNU_MP_VERSION_PATCHLEVEL
     The major and minor GMP version, and patch level, respectively, as
     integers.  For GMP i.j, these numbers will be i, j, and 0,
     respectively.  For GMP i.j.k, these numbers will be i, j, and k,
     respectively.

 - Global Constant: const char * const gmp_version
     The GMP version number, as a null-terminated string, in the form
     "i.j" or "i.j.k".  This release is "4.0.1".