Charles Greathouse on Tue, 06 Jan 2015 18:58:03 +0100

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Re: Problems in 'make bench' under Cygwin/64 with testing elliptic

I imagine the 64-bit version is a good bit faster than the 32-bit version for most purposes? (The Linux 64-bit version is much faster than the Windows 32-bit version on similar machines in my experience.)

Charles Greathouse
Case Western Reserve University

On Tue, Jan 6, 2015 at 11:10 AM, Andreas Kellers <> wrote:

Together with your patch building Pari 2.7.2 from source under Cygwin/64 works without any problems,

Cheers, Andreas

On Tue, Jan 6, 2015 at 3:24 PM, Bill Allombert <> wrote:
On Tue, Jan 06, 2015 at 12:16:55PM +0100, Bill Allombert wrote:
> Both are wrong, the correct result is 66.
> I assume you get the same result with
> ellap(ellinit([0,0,1,-1,0]),10007)
> This is a progress from the state where isprime(131) was wrong.
> The problem is probably in the function "Fp_ellcard_Shanks" in
> src/basemath/FpE.c.

I meant Fl_ellcard_Shanks().

> I will investigate.

I found the bug, the attached patch fixes it (a single line to change).
All tests passes now.
I will include the patch in PARI 2.7.3.

Thanks again for experimenting with cygwin/64!