Other P-1 implementations?

[mathwiz]

Are there other libraries that implement P-1 besides mprime that are reasonably fast (if not quite as fast) and also fairly easy to read/follow the code? Maybe even a library that can be called into.

[Uncwilly]

gpuOwl and mlucas both do P-1

[ixfd64]

GMP-ECM does too, but only for small numbers.

[kriesel]

Originally Posted by mathwiz

Are there other libraries that implement P-1 besides mprime that are reasonably fast (if not quite as fast) and also fairly easy to read/follow the code? Maybe even a library that can be called into.

You don't say what type or size of number you wish to factor. But assuming largish Mersenne numbers, the reference info has this post with an attachment which is periodically updated.
Corresponding to the mprime / prime95 applications, there is the gwnum library of routines.
Others have mentioned gpuowl and Mlucas and gmp_ecm applications, & there's CUDAPm1 & GMP.

There are also some python or perl extended-precision implementations around, and CUDA and OpenCL fft library implementations from which P-1 applications can be developed, and tools like Pari/GP or Mathematica etc. There are a few examples of implementations known to exist, such as LaurV's: https://mersenneforum.org/showpost.p...3&postcount=11 https://www.mersenneforum.org/showpo...&postcount=277
IIRC they were developed more for learning than production.

[tuckerkao]

Originally Posted by Uncwilly

gpuOwl and mlucas both do P-1

Will they consume 99% of the GPU resource and only 1% of the CPU resource like mfaktc? Or will they slow down the Prime95 assignments by a considerable ratio?

I still don't know how to run P-1 on GpuOwl with the Nvidia GPU. What line should I type in to worktodo.txt?

[Uncwilly]

Originally Posted by tuckerkao

I still don't know how to run P-1 on GpuOwl with the Nvidia GPU. What line should I type in to worktodo.txt?

Go find the answer for yourself here: https://www.mersenneforum.org/forumdisplay.php?f=154

[kriesel]

Yes, please use the existing provided resources. And

Originally Posted by Uncwilly

https://www.mersenneforum.org/forumdisplay.php?f=154

is a haystack;
https://mersenneforum.org/showthread.php?t=24607 is its table of contents (or two) with links to use. For those too impatient to read or skim a table of contents, there is a handy feature in most if not all modern browsers, to search for a keyword or phrase in the currently viewed web page. (In Firefox, as easy and fast as Ctrl-F)

[tuckerkao]

Originally Posted by Uncwilly

Go find the answer for yourself here:

The post I eventually found was https://www.mersenneforum.org/showpo...8&postcount=22. It showed Pfactor instead of Pminus1, maybe this has been the reason why I always not be able to reserve the P-1 assignments of Prime95 from the server.