Re: fflog seg fault

[Dan Bailey <pets0undz@gmail.com>]

Thanks very much for clarifying usage of fflog!

Unfortunately, none of these suggestions (use a primitive root,
provide the order, use the daily Windows snapshot binary with and
without GMP) work on my platform.  They all produce the seg fault.

Later, I'll try this on Linux (via VMware) which may simply solve my
problem.  Thanks again for all the help!
Cheers
Dan


On Fri, Oct 1, 2010 at 10:08 AM, Bill Allombert
<Bill.Allombert@math.u-bordeaux1.fr> wrote:
> On Fri, Oct 01, 2010 at 08:59:02AM -0400, Dan Bailey wrote:
>> It does not appear to depend on the RNG seed.  Even after restarting
>> PARI several times, I consistently get this behavior.
>
>> Bill, on which platform is this working for you?
>
> On linux, in 32bit and 64bit, with or without GMP.
>
> Maybe you can try the daily SVN snapshot (a basic windows binary is available),
> see http://pari.math.u-bordeaux.fr/download.html).
>
> There might be a problem in your input:
> gen64=ffgen(f64)
> fflog(gen64^2,gen64)
>
> The documentation says:
> ?? fflog
> ...
>   If  no o is given,  assume that g is a primitive root.
>
> However, gen64 is not a primitive root (use ffprimroot for that).
> ? fforder(gen64)
> %3 = 6148914691236517205
> ? 2^64-1
> %4 = 18446744073709551615
> ? fflog(gen64^2,gen64)
> %5 = 12297829382473034412
>
> You should do
> ? o = fforder(gen64)
> %11 = 6148914691236517205
> ? fflog(gen64^2,gen64,o)
> %12 = 2
>
> Cheers,
> Bill.
>