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wfgarnett3 2004-03-27 11:34

is LLR working right?
 
Is LLR working right?

I am using a Pentium III 600 Mhz.

For PRP, when I test the Riesel number:
465*2^300000-1,
it has a per iteration time of around 7.6 ms.

However, when I use this new LLR, it has a per iteration time of around 6.3 ms.

Is there something wrong?

regards,
william

Edit: here is the llrresults file:

[Sat Mar 27 06:32:50 2004]
Using IBDWT : Mersenne fftlen = 14336, Proth fftlen = 28672, Used fftlen = 28672

paulunderwood 2004-03-27 12:24

Jean wrote Yahoo! primenumbers:

[QUOTE]So, this program uses IBDWT only if k <= 511 in non SSE2 code, and (alas...) k <= 31 in SSE2 code ; for larger k's, it works exactly like the previous LLR version, using Proth mode and rational bases FFT. But for really small k's, it is a major improvement:
[/QUOTE]

So it is very small k <=31 on a SSE2 P4 that get's the maximum boost of about 400%

paulunderwood 2004-03-27 12:49

[QUOTE]this program uses IBDWT only if k <= 511 in non SSE2 code[/QUOTE]

I wonder if Jean meant less than 256 which is 2^8 ... :unsure:

ET_ 2004-03-27 16:54

[QUOTE=Maybeso]What about bumping the priority to maximum, and then stopping it. Would that help?

Bruce[/QUOTE]

No it wouldn't. The prorgam seems to start correctly, but the first iteration count comes out after 2-4 minutes. :sad:

Luigi

Thomas11 2004-03-31 18:25

Just one short note:

It seems that the "+016" bug happens under Windows only. I've tested some low n-values for k=5 and k=7 twice on a Athlon runing Windows and on a P4 running Linux. I've got some "+016" results on the Athlon/Windows but not on the P4/Linux.
As Paul already noted, the Res64 values are the same, so I expect it to be a bug in the screen/file output routine and not in the entire calculation.

Well, from the above I could also conclude that it is a problem of the Athlon. But I guess, that most of you, who encountered the same problem, are using P4 machines running some version of Windows ...

-- Thomas.

P.S.: Tomorrow my machine(s) will take an out-time, since due to maintenance work we will be out of electrical power the whole day. So, don't expect any new primes from my end for tomorrow :yawn:

wfgarnett3 2004-04-12 03:21

next version LLR
 
Next version of LLR released with few bug fixes.
[url]http://groups.yahoo.com/group/primenumbers[/url]

regards,
william

paulunderwood 2004-04-12 11:37

Thanks for the link William.

I am still having problems with "stop/continue" and starting LLR if a "save file" exists. A save file is created when you shutdown Windoze. I get around the problem by making sure no "save files" exist by use of the following dos batch file in C:\WINDOWS\Start Menu\Programs\StartUp\llr.bat

cd \paul\llr -- this will be different for you
del y*.*
del z*.*
llr.exe
exit

Jean Penne assure me that "stop/continue" does work after a time -- but to me it seems an inordinate amount of time!

ET_ 2004-04-12 11:55

[QUOTE=wfgarnett3]Next version of LLR released with few bug fixes.
[url]http://groups.yahoo.com/group/primenumbers[/url]

regards,
william[/QUOTE]

Waiting to download it from GIMPS :rolleyes:

Luigi

paulunderwood 2004-08-01 22:24

Jean Penne is about make available the very latest LLR ( based on George Woltman's latest IBDWT library?) [URL=http://groups.yahoo.com/group/primenumbers/message/15182]see here[/URL] Also keep a look over the next few days for the new program at [URL=http://www.mersenne.org/gimps/]http://www.mersenne.org/gimps/[/URL] Jean claims to have fixed the stop/continue bug... :cool:

Big thanks to Jean and George :bow: :bow: :bow:

Lupine1647 2004-08-01 22:55

All bow down to the great creators!!!!

:bow: :bow: :bow: :bow: :bow: :bow:

ET_ 2004-08-02 11:51

Fine!

I'll download it as soon as it is released!

Luigi


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