On Thu, Jun 11, 2009 at 1:00 PM, gerrob<[email protected]> wrote:

> I've uploaded a new code (wagstaff2.c) in google groups to test
> Wagstaff numbers by Anton Vrba's conjecture. It's  faster than
> wagstaff.c from Jeff Gilchrist because I'm using bitshift+bitmask
> instead of the expensive divisions. For example for q=83339 it took me
> 127 sec. while the old code took 516 sec. on my machine, so about 4
> times speed up.

Thanks Robert, do you mind if I use your modified code?  I just threw
that together without optimization in mind so I appreciate you
speeding it up.

Jeff.

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