[QUOTE=c10ck3r;339620]So, what exactly do I have to do after downloading? The .exe doesn't seem to work as-is for me...[/QUOTE]

If you extract everything from the zip in the same directory, simply double-clicking the exe will run a test case that should find a factor. If that doesn't work, run from a cmd prompt to see the error.

This version fixes the free without malloc bug when stage 2 isn't run. owftheevil is still looking into the occasional cufft hangs.

[URL="https://www.dropbox.com/s/xucdi2ht4rbe6go/cudapm1_x64_20130509.zip"]https://www.dropbox.com/s/xucdi2ht4rbe6go/cudapm1_x64_20130509.zip[/URL]

Before running CUDAPm1, it may be a good idea to test your GPU to verify that it can handle CUDALucas/CUDAPm1 calculations accurately. Here's a trial Windows x64 version of owftheevil's memtest:

[URL="https://www.dropbox.com/s/4lh34niqddm5tf8/CUDAmemtest_20130509.zip"]https://www.dropbox.com/s/4lh34niqddm5tf8/CUDAmemtest_20130509.zip[/URL]

I'm trying to make/compile the source on the big iron Linux system, but it keeps crying out that gmp.h cannot be found. Any ideas?

Install gmp?

I get the message (In command prompt):
device_number >= device_count ... exiting
(This is probably a driver problem)
with:
NVIDIA GeForce GTX 460
Memory 768 MB
Memory type 2
Driver version 6.14.13.0142

Is this owf's same problem?

I was now able to find the factor for M61394569

@owftheevil: here is the total output of the commandline:
[url]https://dl.dropboxusercontent.com/u/27359940/cudapm1%20complete.txt[/url]

Funny thing is, I ran the program with 0% CPU usage. I'll be checking tonight if CPU load does (perhaps) makes a difference....

[QUOTE=c10ck3r;339968]I get the message (In command prompt):
device_number >= device_count ... exiting
(This is probably a driver problem)
with:
NVIDIA GeForce GTX 460
Memory 768 MB
Memory type 2
Driver version 6.14.13.0142

Is this owf's same problem?[/QUOTE]
Change the "DeviceNumber=" parameter in CUDALucas.ini to 0 and/or 1 and see if anything happens.

[QUOTE=Karl M Johnson;339970]Change the "DeviceNumber=" parameter in CUDALucas.ini to 0 and/or 1 and see if anything happens.[/QUOTE]
Nope :(

Sounds like a driver problem. Try downloading and reinstalling the latest cuda drivers from nVidia's website.

[QUOTE=frmky;340000]Sounds like a driver problem. Try downloading and reinstalling the latest cuda drivers from nVidia's website.[/QUOTE]

When doing the above I strongly recommend a careful removal of the existing drivers. Uninstall all the nVidia items in 'Programs and Features', doing the graphics driver last.

If you want to be really thorough, download Driver Fusion here- [URL]http://treexy.com/thanks?file=/media/30691/driver_fusion_1.6.0.exe[/URL]
After uninstalling the drivers, boot into Safe Mode and run Driver Fusion. Select nVidia Display and nVidia PhysX and click 'Analyze'. When it completes, click Delete, OK, and Restart.

You should then come up in normal mode with generic VGA drivers, probably at some horrible low resolution. Disable your anti-virus temporarily. Run the driver setup as an Admin. Do a Custom install, select only Graphic Driver, PhysX, and Clean Install. (An exception to this would be if you game with 3D glasses on. Then you have to add the two 3D drivers. Leave them out if you don't need them as they consume memory to no good end.)

I actually go one step more and run a Registry Cleaner before I leave Safe Mode.

I got the outline for this from some site, possibly Guru 3D. The author insisted on some other steps, but even I found them excessive and probably not helpful.

I certainly cleared up some odd problems by making sure all the old driver components were gone.

cudaMemTest successfully running in all my gtx580's, almost finished, no errors up to now (water cooled all, but gpu temperatures much lower comparing with cudaLucas, or mfaktc).

I had small trouble caused by the fact that cuxxx[COLOR=Red]64[COLOR=Black]_50_35.dll are n[/COLOR][/COLOR]ot included, but found them on the other zip (with P1 exe, not yet running, after tests finish I will give a try for few expos).