idealprimedec() behavior

Hi pari dev,

I found the following idealprimdec() behavior:

(12:28) gp > nf=bnfinit(x^2+5);

(12:28) gp > id=idealprimedec(nf,3)[1];id

%5 = [3, [-1, 1]~, 1, 1, [1, -5; 1, 1]]

(12:28) gp > idealfactor(nf,id)

%6 =

[[3, [-1, 1]~, 1, 1, [1, -5; 1, 1]] 1]

(12:29) gp > idtwo=idealtwoelt(nf,id);idtwo

%7 = [3, [-1, 1]~]

(12:29) gp > idealfactor(nf,idtwo)

%8 =

[ [3, [-1, 1]~, 1, 1, [1, -5; 1, 1]] 1]

[[3, [1, 1]~, 1, 1, [-1, -5; 1, -1]] 1]

What I expected is that %6 and %9 are the same.

Am I missing something?

I'm using:

GP/PARI CALCULATOR Version 2.9.4 (released)

amd64 running mingw (x86-64/GMP-6.1.2 kernel) 64-bit version

compiled: Dec 20 2017, gcc version 4.9.1 (GCC)

threading engine: single

(readline v6.2 enabled, extended help enabled)

Sincerely.

---
Iwao KIMURA

Dept. Math., University of Toyama, Japan.