The following inputs to gcry_mpi_invm():

36fb5bdb5daa9864113ad8a49a41722fc7003a40b02a13daca6997859c2d8534192ff6c02447
25c88352cfa171fc728503df037c355a6d5588b22e3510b08f10848ad7c0980b400

produces the number:

66CAF1A9A03478A288760C2E05E237F11432BA70BECEE56D942ACCD337470E5D77

But this is incorrect (another library reports the modular inverse does not
exist).

The following inputs to gcry_mpi_invm():

12cf3a8ca3d97bea2f080362600cee355
1c3fddf62aee0be2f6dc2ef8471f1be2e

produces the number:

60A6520F494E6EE6EE436283FB34B945

but it should produce:

1339462644931fd624528ea6b3fb1f985