- 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.k”. This release is

`"6.3.0"`

. Note that the format “i.j” was used, before version 4.3.0, when k was zero.