New Issue: [Library Stabilization] Should 'bigint.probab_prime_p()' return an enum instead?

[lydia-duncan-github]

17706, "lydia-duncan", "[Library Stabilization] Should 'bigint.probab_prime_p()' return an enum instead?", "2021-05-12T21:41:56Z"

[Library Stabilization] Should `bigint.probab_prime_p()` return an enum instead?

We could potentially return an enum value that better documents the state (but it would only matter for this function, I think)