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+- **Changed:**
+ Coq's core system now uses the `zarith <https://github.com/ocaml/Zarith>`_
+ library, based on GNU's gmp instead of ``num`` which is
+ deprecated upstream. The custom ``bigint`` module is
+ not longer provided; note that the ``micromega`` still uses
+ ``num``
+ (`#11742 <https://github.com/coq/coq/pull/11742>`_,
+ by Emilio Jesus Gallego Arias and Vicent Laporte).