llrCUDA Version 3.8.7 is released!

[Jean Penné]

Hi All,

I uploaded to-day the new version 3.8.7 of llrCUDA on my personal site jpenne.free.fr

What is new in this version :

I added two new ABC formats, principally to help PRP searchers.
- k*b^n+c format with k, b, c fixed, for example : ABC 22*17^n+13
- (k*b^n+c)/d format with k, b, c, d fixed, for example : ABC (16^n+619)/5
- In Proth or LLR tests, even values of k yield a false result...
These bugs are now fixed.
May 2022 : The range of available FFT lengthes has been extended using
SSE2 Woltman tables. This allowed this version to test successfully
M82589933 in less than 8 days!

Here are some of previous updates :

- The maximum value of bits per input double word that was defaulted to 35.0 is now defaulted to 37.0.
moreover, it may be changed by user, using -oMAXBPD=xx.x option.
It can be useful to decrease this value if too much round off errors occur...

- 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!
No much new feature, but some improvements related to reliability and speed.

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

[Jean Penné]

Hi,

While testing k*2^n+c or (k*2^n+c)/d numbers using this new version, I saw many Round off errors...
This was due to an under estimate of the number of bits per words in the double words array form of the number, when abs(c) > 1
This drawback is fixed to-day.

Best Regards,
Jean

[Jean Penné]

Hi,

I succeeded to-day to build a static binary for llrCUDA 3.8.7 by updating correctly the Makefile.
So, I uploaded the new binaries and the source directory accordingly.

Best Regards,

Jean

[Honza]

Please, Windows build, anyone?

[Jean Penné]

Originally Posted by Honza

Please, Windows build, anyone?

Not yet, sorry...

Jean

[henryzz]

Originally Posted by Honza

Please, Windows build, anyone?

It should work in WSL2.

[Honza]

Originally Posted by henryzz

It should work in WSL2.

What distribution would you recommend?

[Mark Rose]

Originally Posted by Honza

What distribution would you recommend?

WSL2 is basically a Linux distribution inside of Windows. You need to install it.

[henryzz]

Originally Posted by Honza

What distribution would you recommend?

I have only used the ubuntu version of WSL/WSL2. It was one of the first available. I suspect that support is the best for it.
I have run other CUDA apps(and possibly a version of this) on it.

[Honza]

Originally Posted by Mark Rose

WSL2 is basically a Linux distribution inside of Windows. You need to install it.

It did install it.
https://www.c-sharpcorner.com/articl...on-windows-11/

After restart, it explicitly says that you need to install specific distro.
(when trying to start WSL, it says the same error on command line).

I know it's a mess will all different distros and libriries etc.
My idea was to use statically linked libs.

But which distro before I mess up my Windows system?

Windows binary would much easier.
I don't know if there is performance penatly because it would run in WSL and what other limitations there arebut still willing to try.

[Mark Rose]

I would pick Ubuntu. Ubuntu and Microsoft have been working together on the development of WSL.

I haven't touched Windows in about a decade though. Others with more experience may chime in.