[GAP Forum] LogFFE bug

[Horn, Max, Prof. Dr.]

Dear Joey,

thank you for the bug report. I can confirm the issue, and logged an issue for it on our bug tracker: <https://github.com/gap-system/gap/issues/3784>

We will get back to you once we have a fix.

Cheers,
Max

> On 16. Dec 2019, at 19:26, Iverson, Joseph W [MATH] <jwi at iastate.edu> wrote:
> 
> Dear GAP forum,
> 
> There appears to be a bug with LogFFE:
> 
> ┌───────┐   GAP 4.10.1 of 23-Feb-2019
> │  GAP  │   https://www.gap-system.org
> └───────┘   Architecture: x86_64-apple-darwin18.5.0-default64-kv3
> Configuration:  gmp 6.1.2
> Loading the library and packages ...
> Packages:   AClib 1.3.1, Alnuth 3.1.0, AtlasRep 1.5.1, AutoDoc 2019.02.22, AutPGrp 1.10, Browse 1.8.8, Carat 2.2.3, CRISP 1.4.4, Cryst 4.1.18, CrystCat 1.1.8, CTblLib 1.2.2, 
>             FactInt 1.6.2, FGA 1.4.0, GAPDoc 1.6.2, IO 4.5.4, IRREDSOL 1.4, LAGUNA 3.9.2, Polenta 1.3.8, Polycyclic 2.14, PrimGrp 3.3.2, RadiRoot 2.8, ResClasses 4.7.1, 
>             SmallGrp 1.3, Sophus 1.24, SpinSym 1.5, TomLib 1.2.7, TransGrp 2.0.4, utils 0.61
> Try '??help' for help. See also '?copyright', '?cite' and '?authors'
> gap> z:=Z(359^2); 
> z
> gap> LogFFE(z^4,z^2);
> fail
> 
> According to the documentation, LogFFE(alpha,beta) should only return "fail" if alpha is not a power of beta. Is 359^2 just too big to ask questions like this?
> 
> Best regards,
> Joey Iverson
> 
> Assistant Professor
> Department of Mathematics
> Iowa State University
> 
> 
> 
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-- 
Prof. Dr. Max Horn
University of Siegen
Department of Mathematics
Emmy Noether Campus
Walter-Flex-Straße 3
57072 Siegen
Tel. (+49) 271 740-2868
E-Mail: max.horn at uni-siegen.de