Igor Schein on Fri, 21 May 2004 01:50:02 +0200


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Re: galoisinit() bug


On Fri, May 21, 2004 at 12:21:30AM +0200, Bill Allombert wrote:
> On Tue, May 18, 2004 at 09:11:23PM -0400, Igor Schein wrote:
> > Hi,
> > 
> > ? galoisinit(x^4+272*x^3+40256*x^2+1740800*x+25397248);
> >   ***   prime too small in fixedfield.
> > 
> > It was already broken in 2.2.4.
> ... and even in 2.2.0.

Not according to this:

                    GP/PARI CALCULATOR Version 2.2.0 (alpha)
                i686 running linux (ix86 kernel) 32-bit version
              (readline v4.3 enabled, extended help not available)

                       Copyright (C) 2000 The PARI Group

PARI/GP is free software, covered by the GNU General Public License, and
comes WITHOUT ANY WARRANTY WHATSOEVER.

Type ? for help, \q to quit.
Type ?12 for how to get moral (and possibly technical) support.

   realprecision = 28 significant digits
   seriesprecision = 16 significant terms
   format = g0.28

parisize = 4000000, primelimit = 500000
? galoisinit(x^4+272*x^3+40256*x^2+1740800*x+25397248)                              
%1 = [x^4 + 272*x^3 + 40256*x^2 + 1740800*x + 25397248, [17, 16, 48661191875666868481], [20274028713272432621, 42326019394630412572, 8161514497541012525, 26560821145889878972]~, [5801871960997144509, 24998487601695568226, 17977779685848871933, 48544247193441838310; 42431766968314633483, 46928316050841162444, 38507189729095421956, 18116302878749387560; 34156568755846227231, 39353028934093779049, 44374202015633215197, 28099775921427383966; 28025826970458995595, 10654257573951473973, 8182630831191442531, 1798476500064956382], 2690649686016, [[1, 2, 3, 4], [3, 4, 1, 2], [2, 1, 4, 3], [4, 3, 2, 1]], [[3, 4, 1, 2], [2, 1, 4, 3]], [2, 2]]

Unless the output is wrong, it looks like it worked OK prior to
2.2.4.  

Igor