llrCUDA Version 3.8.5 is released!
 

Hi All,

This GPU version of the LLR program has the same features as the previous 3.8.3, but I think that the updates made from it deserve to change the version number.
Here are some of these updates :

- In previous Version 3.8.4, one call to free() function was missing in
Gerbicz error checking code ; this caused an important memory leak...
This issue is now fixed here!

- K*2^n+c numbers can now be tested using IBDWT, even if abs(c) != 1
- All 64 bits residues match with those obtained with LLR 3.8.24
- several issues found on llrCUDA 3.8.3b3 are now fixed.

Please, let me know if you have any problem to run the binary on Linux and/or to build it on your system.

I wish you many successes in prime hunting!
Best Regards,
Jean

[QUOTE=Jean Penné;602325]Hi All,

This GPU version of the LLR program has the same features as the previous 3.8.3, but I think that the updates made from it deserve to change the version number.
Here are some of these updates :

- In previous Version 3.8.4, one call to free() function was missing in
Gerbicz error checking code ; this caused an important memory leak...
This issue is now fixed here!

- K*2^n+c numbers can now be tested using IBDWT, even if abs(c) != 1
- All 64 bits residues match with those obtained with LLR 3.8.24
- several issues found on llrCUDA 3.8.3b3 are now fixed.

Please, let me know if you have any problem to run the binary on Linux and/or to build it on your system.

I wish you many successes in prime hunting!
Best Regards,
Jean[/QUOTE]

Where is the download link?

[QUOTE=ET_;602360]Where is the download link?[/QUOTE]

Not to step on Jean's toes, but this was provided in his other post: [url]http://jpenne.free.fr/[/url]

[QUOTE=sdbardwick;602362]Not to step on Jean's toes, but this was provided in his other post: [url]http://jpenne.free.fr/[/url][/QUOTE]

Thanks... my bad, I didn't look below the newest link :redface:

I was attempting to use this software and got the following error "jesus@Magellan:~/CudaLucas/2/llrcuda385src$ ./llrCUDA -a333333991
*** buffer overflow detected ***: terminated
Aborted (core dumped)
"

[QUOTE=Magellan3s;604949]I was attempting to use this software and got the following error "jesus@Magellan:~/CudaLucas/2/llrcuda385src$ ./llrCUDA -a333333991
*** buffer overflow detected ***: terminated
Aborted (core dumped)
"[/QUOTE]

What did you expect? From the [U]readme.txt[/U]: - [C]With -a, you choose another set of .ini and results file.
[/C]
What you should do is run the program with [C]-m[/C] (or possibly [C]-q[/C] if it is just one candidate)

:rtfm:

[QUOTE=paulunderwood;604950]What did you expect? From the [U]readme.txt[/U]: - [C]With -a, you choose another set of .ini and results file.
[/C]
What you should do is run the program with [C]-m[/C] (or possibly [C]-q[/C] if it is just one candidate)

:rtfm:[/QUOTE]

Sorry, I got it running but I was unable to change the FFT length or test 100 million digit prime numbers.

[QUOTE=Magellan3s;604989]Sorry, I got it running but I was unable to change the FFT length or test 100 million digit prime numbers.[/QUOTE]

I am glad you got it running. Why do you want to change the FFT length? What is the form of the 100 million digit candidate prime numbers you have in mind?

[QUOTE=paulunderwood;605002]I am glad you got it running. Why do you want to change the FFT length? What is the form of the 100 million digit candidate prime numbers you have in mind?[/QUOTE]

The current FFT length for a wavefront Mersenne number I attempted to test ~ 113,687,731 selected an FFT of 15M which is much higher than the 6M which should be used for that particular exponent.

[code]
jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^113687731-1"
Starting Fermat PRP test of 1*2^113687731-1
Using complex rational base DWT and generic reduction, FFT length = 15728640, a = 3
Iteration: 1 / 113687731 [0.00%].

[/code]


I then attempted to test another number M333333991 but the program said the number was too big.

[code]
jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^333333991-1"
Requested giant too big.
[/code]

[QUOTE=Magellan3s;605019]The current FFT length for a wavefront Mersenne number I attempted to test ~ 113,687,731 selected an FFT of 15M which is much higher than the 6M which should be used for that particular exponent.

[code]
jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^113687731-1"
Starting Fermat PRP test of 1*2^113687731-1
Using complex rational base DWT and generic reduction, FFT length = 15728640, a = 3
Iteration: 1 / 113687731 [0.00%].

[/code]


I then attempted to test another number M333333991 but the program said the number was too big.

[code]
jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^333333991-1"
Requested giant too big.
[/code][/QUOTE]

While it is admirable to attempt testing Mersenne numbers with llrCUDA, most people run gpuOwl for them. Timing comparisons would be interesting.

[QUOTE=paulunderwood;605022]While it is admirable to attempt testing Mersenne numbers with llrCUDA, most people run gpuOwl for them. Timing comparisons would be interesting.[/QUOTE]


Yes, this program interested me because it was specifically coded with CUDA!