[QUOTE=kladner;294528]But at the moment, it ignores -f for some reason. I'll get back to it in a bit.[/QUOTE]

I just had to move the check files out of the folder. -f 474560 does run faster than the default 1572864. [CODE]474560
err = 0.09766 (0:50 real, 4.9958 ms/iter
1572864
err = 0.02148 , 5.3635 ms/iter[/CODE]

It seems the fft could go smaller, but I'll have to read the part of the thread that's been posted since I started experimenting and writing about it.

[QUOTE=kladner;294547]-f 474560 does run faster than the default 1572864. [CODE]474560
err = 0.09766 (0:50 real, 4.9958 ms/iter
1572864
err = 0.02148 , 5.3635 ms/iter[/CODE]It seems the fft could go smaller, but I'll have to read the part of the thread that's been posted since I started experimenting and writing about it.[/QUOTE]


Oops. That is 1474560. So far the smallest that doesn't terminate on a GTX 460 with a 26M exponent.

[QUOTE=kladner;294571]Oops. That is 1474560. So far the smallest that doesn't terminate on a GTX 460 with a 26M exponent.[/QUOTE]
That was the same for me on a 580

[QUOTE=kladner;294524]
EDIT: This is weird. <snitp>
But CuLu continues to start with 1572864.[/QUOTE]
You have to delete the checkpoint file "cXXXXX" and "tXXXX". If there is a checkpoint file it will always resume from where it left, and the checkpoint files are not interchangeable, they have the size of the fft used. So, if a file with old fft-size size exists, it will use THAT size regardless of what -f you use. So, you can appreciate, if you job is done more then 10-15-20% or so, it would be faster to let it finish with old 1572864 (=32768*48), then use 1474560 (=32768*45) starting with the new exponent. Both sizes work well for 26-27M range, the shortest one is faster between 10% and 30% depending on your card. Use fftbench option as explained before to check exactly for your card.

[QUOTE=flashjh;294586]That was the same for me on a 580[/QUOTE]

Thanks again for throwing that out there. It made a difference for me.

[code]
Processing result: M( 26768243 )C, 0x3280d4e28ef0b188, n = 1474560, CUDALucas v2.00
LL test successfully completes double-check of M26768243
[/code]

Successful LLDC with CuLu:

[CODE]26158007No factors below2^69
P-1B1=390000
Verified LLB50D7F090E32331F by "David Triggerson"
Verified LLB50D7F090E32331F by "ktony" on 2012-03-31
Historyno factor for M26158007 from 2^67 to 2^68 [mfaktc 0.17-Win barrett79_mul32] by "lalera" on 2011-12-05
Historyno factor for M26158007 from 2^68 to 2^69 [mfaktc 0.18-pre7 71bit_mul24] by "Luigi Morelli" on 2011-12-06
Historyb50d7f090e3233__ by "ktony" on 2012-03-31[/CODE]

I've been assigned triple check and got mismatch with the first two checks for 28982959.

I've run the check twice with different FFT lengths (and -t both times) and got all residues match.

Could someone run it through P95?

Thanks,
Andriy

[QUOTE=apsen;295165]I've been assigned triple check and got mismatch with the first two checks for 28982959.

I've run the check twice with different FFT lengths (and -t both times) and got all residues match.

Could someone run it through P95?

Thanks,
Andriy[/QUOTE]

I'll run it. Will take a few days.

Does anyone have any Linux (64bit) binaries?

If not, what SDK version do I need, and how exactly do I use the makefile? (Just 'make'? I've sometimes seen fancier things, like 'make; 'makeall && install' or some such, so I want to be sure.)

[QUOTE=Dubslow;295197]Does anyone have any Linux (64bit) binaries?

If not, what SDK version do I need, and how exactly do I use the makefile? (Just 'make'? I've sometimes seen fancier things, like 'make; 'makeall && install' or some such, so I want to be sure.)[/QUOTE]
You not need SDK.
[code]
$ cat Makefile
CUDALucas: CUDALucas.o
g++ -O2 -fPIC -o CUDALucas CUDALucas.o -L/usr/local/cuda/lib64 -L/usr/local/cuda/lib64 -lcufft -lm
CUDALucas.o: CUDALucas.cu
/usr/local/cuda/bin/nvcc -O2 -arch=sm_13 -I/usr/local/include CUDALucas.cu -c
clean:
-rm *.o CUDALucas
$ make
/usr/local/cuda/bin/nvcc -O2 -arch=sm_13 -I/usr/local/include CUDALucas.cu -c
g++ -O2 -fPIC -o CUDALucas CUDALucas.o -L/usr/local/cuda/lib64 -L/usr/local/cuda/lib64 -lcufft -lm
$ ./CUDALucas -r
Iteration 10000 M( 86243 )C, 0x23992ccd735a03d9, n = 4608, CUDALucas v2.00 err = 0.01074 (0:20 real, 2.0263 ms/iter, ETA 2:21)
[/code]