Re: PARI/GP wrong on 7!!+7+1 being not prime, or oeis.org/Mathematica?

Andreas Enge <[email protected]> Sat, 30 Aug 2025 10:26:27 +0200

Newsgroups	gmane.comp.mathematics.pari.user
Message-ID	<aLK1s2NxljQUARtr@jurong>

Am Fri, Aug 29, 2025 at 10:22:03PM +0200 schrieb Vincent Delecroix:
> Note that GMP does
>   mpz_mfac_uiui (mpz_t rop, unsigned long int n, unsigned long int m)
> Though I do not know whether it could easily be called with a
> PARI integer from the gp interpreter.

It could, by adding it to PariTwine:
   https://www.multiprecision.org/paritwine/

Andreas