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

Bill Allombert <[email protected]> Thu, 28 Aug 2025 19:59:33 +0200

Newsgroups	gmane.comp.mathematics.pari.user
Message-ID	<aLCZBWHPSkzMWUa6@seventeen>

On Thu, Aug 28, 2025 at 05:02:28PM +0200, [email protected] wrote:
> @Bill, you once added primorial operator after first stating "not needed".
> 
> $ gp -q
> ? version
> [2, 16, 1]
> ? 7#
> 210
> ?
> 
> Are you in the mood of adding another operator (!!) to GP?

Adding this one would break backward compatibility, so this is not
an option.

? 3!!
%1 = 720

Cheers,
Bill