Has anyone tried doing stage 1 prime95 and stage 2 in ecm-gmp 5.0? Ecm-gmp has a vastly superior stage 2.

Even better for the ambitious reader would be taking the ecm-gmp sources and integrating the mprime FFT routines.

Is it safe to assume this is far more than a "cut and paste"?

Also, would the GMP-ECM folks mind the loss of portability?

[quote="pakaran"]Is it safe to assume this is far more than a "cut and paste"?[/quote]

Yes, changing the source code would be tricky.

As to running stage 1 in prime95/mprime and stage 2 in ecm-gmp that shouldn't be too much harder than some cut/paste/scripts. The hooks are in prime95 to output the stage 1 result, and I asked Paul to implement a hook to accept a stage 1 result and only run stage 2.

ecm-gmp's stage 2 is more than twice as effective at finding factors than prime95.

Thanks for the quick reply George.

I know little about C and ASM beyond what I learned in my 300-level programming languages course, so I guess I'm not the one to do it :(.

Is there any reason the more effective Phase 2 code couldn't be implimented in a future version of Prime95?

Does it take longer than the current Prime code?

[quote="Prime95"]Has anyone tried doing stage 1 prime95 and stage 2 in ecm-gmp 5.0? Ecm-gmp has a vastly superior stage 2.
[/quote]

I'm still looking for a windows binary (pref. an optimized P4 version).

Anyone out there who has one ?