Install libgf2x1 by entering the following commands in the terminal:
sudo apt update sudo apt install libgf2x1
Description:
Routines for fast arithmetic in GF(2)[x]
GF2X is a C/C++ software package containing routines for fast arithmetic in GF(2)[x] (multiplication, squaring, GCD) and searching for irreducible/primitive trinomials.
Homepage: http://gf2x.gforge.inria.fr/
Version: 1.2-5
Section: universe/math