Karim.Belabas on Mon, 9 Apr 2001 18:59:27 +0200 (MET DST)


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Re: nffactor() memory infefficiency 

On Fri, 6 Apr 2001, Bill Allombert wrote:
> On Wed, Dec 20, 2000 at 01:23:51PM -0500, Igor Schein wrote:
> > Hi,
> > 
> > the following command needs at least 180MB of stack
> > to complete:
> > 
> > nffactor(nfinit(y^3+y^2+2),x^24+69)
> > 
> > I don't see a reason why this has to be a *tough* case.  Running it at
> > \gm20 doesn't show all the memory allocation, so it's possible that there's a
> > memory leak.  I'm using latest CVS version.
> > 
> 
> It works fine with 2.2.0 . Will the fix be backported to 2.1.x ?

Yes [was not checking enough prime ideals during the modular factorization
part].

    Karim.
-- 
Karim Belabas                    email: Karim.Belabas@math.u-psud.fr
Dep. de Mathematiques, Bat. 425
Universite Paris-Sud             Tel: (00 33) 1 69 15 57 48
F-91405 Orsay (France)           Fax: (00 33) 1 69 15 60 19
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