Re: Please test pari-2.17.4 prerelease 1

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Tue, Jun 23, 2026 at 11:25:32AM +0200, hermann@stamm-wilbrandt.de wrote:
> On 2026-06-22 14:07, Bill Allombert wrote:
> > Dear PARI developers,
> > 
> > We have made available a prerelease of PARI 2.17.4 (stable).
> 
> I did not respond to your previous email wrt experimental "=" feature that I
> really like. Any chance that it will make it into 2.17.4?
> 
> ? version
> %2 = [2, 17, 4]
> ? [[b,a]|b<-[1..10];a<-[b!+1],issquare(b)]
> %3 = [[1, 2], [4, 25], [9, 362881]]
> ? [[b,a]|b<-[1..10];a=b!+1,issquare(b)]
>   ***   syntax error, unexpected '=', expecting '<' or '[' or ':':
> [[b,a]|b<-[1..10];a
>   ***   =b!+1,issquare(b)]
>   ***   ^------------------

Ah no sorry, this will have to wait for 2.19.0, but fortunately this one should
happen before September. I also need to release a new version of GP2C
that support that feature, but this is already implemented.

> Reason is that they test with default distributions of PAR/GP that are
> backlevel.
> 
> One example where I was not allowed to use primorial operator for that
> reason was:
> https://oeis.org/A391020

Yes, but you need to take into account that a lot of OEIS users are using old
PARI/GP versions... I know this is annoying, this is the price we pay for being
around for 40 years.

Cheers,
Bill