mersenneforum.org llrCUDA Version 3.8.5 is released!
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 2022-03-22, 20:05 #1 Jean Penné     May 2004 FRANCE 2·5·61 Posts 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
2022-03-23, 09:04   #2
ET_
Banned

"Luigi"
Aug 2002
Team Italia

12F016 Posts

Quote:
 Originally Posted by Jean Penné 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

2022-03-23, 09:31   #3
sdbardwick

Aug 2002
North San Diego County

22·193 Posts

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

2022-03-23, 12:28   #4
ET_
Banned

"Luigi"
Aug 2002
Team Italia

24·3·101 Posts

Quote:
 Originally Posted by sdbardwick Not to step on Jean's toes, but this was provided in his other post: http://jpenne.free.fr/

 2022-04-28, 22:25 #5 Magellan3s   Mar 2022 Earth 22·19 Posts I was attempting to use this software and got the following error "jesus@Magellan:~/CudaLucas/2/llrcuda385src$./llrCUDA -a333333991 *** buffer overflow detected ***: terminated Aborted (core dumped) " 2022-04-29, 00:01 #6 paulunderwood Sep 2002 Database er0rr 22×1,087 Posts Quote:  Originally Posted by Magellan3s I was attempting to use this software and got the following error "jesus@Magellan:~/CudaLucas/2/llrcuda385src$ ./llrCUDA -a333333991 *** buffer overflow detected ***: terminated Aborted (core dumped) "
What did you expect? From the readme.txt: - With -a, you choose another set of .ini and results file.

What you should do is run the program with -m (or possibly -q if it is just one candidate)

2022-04-29, 23:55   #7
Magellan3s

Mar 2022
Earth

22×19 Posts

Quote:
 Originally Posted by paulunderwood What did you expect? From the readme.txt: - With -a, you choose another set of .ini and results file. What you should do is run the program with -m (or possibly -q if it is just one candidate)
Sorry, I got it running but I was unable to change the FFT length or test 100 million digit prime numbers.

Last fiddled with by Magellan3s on 2022-04-29 at 23:57

2022-04-30, 04:24   #8
paulunderwood

Sep 2002
Database er0rr

22·1,087 Posts

Quote:
 Originally Posted by Magellan3s Sorry, I got it running but I was unable to change the FFT length or test 100 million digit prime numbers.
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?

2022-04-30, 13:10   #9
Magellan3s

Mar 2022
Earth

1148 Posts

Quote:
 Originally Posted by paulunderwood 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?
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$./llrCUDA -d -q"1*2^113687731-1" Starting Fermat PRP test of 1*2^113687731-1 Using complex rational base DWT and generic reduction, FFT length = 15728640, a = 3 Iteration: 1 / 113687731 [0.00%]. I then attempted to test another number M333333991 but the program said the number was too big. Code: jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^333333991-1"
Requested giant too big.

Last fiddled with by Magellan3s on 2022-04-30 at 13:15

2022-04-30, 13:38   #10
paulunderwood

Sep 2002
Database er0rr

10FC16 Posts

Quote:
 Originally Posted by Magellan3s 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$./llrCUDA -d -q"1*2^113687731-1" Starting Fermat PRP test of 1*2^113687731-1 Using complex rational base DWT and generic reduction, FFT length = 15728640, a = 3 Iteration: 1 / 113687731 [0.00%]. I then attempted to test another number M333333991 but the program said the number was too big. Code: jesus@Magellan:~/CudaLLR/llrcuda385src$ ./llrCUDA -d -q"1*2^333333991-1" Requested giant too big.
While it is admirable to attempt testing Mersenne numbers with llrCUDA, most people run gpuOwl for them. Timing comparisons would be interesting.

Last fiddled with by paulunderwood on 2022-04-30 at 13:39

2022-04-30, 16:43   #11
Magellan3s

Mar 2022
Earth

22·19 Posts

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

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

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