Prime95 version 26.5 - Page 3

Prime95 · 2011-02-08, 15:00

Quote:

Originally Posted by Prime95

I tried installing 32-bit Debian and soon descended into libcurl dependency hell.

I found my notes about how to get out of dependency hell. The 32-bit Linux version is now available!

The 32-bit version was built on Ubuntu 10.04, the 64-bit version was built on Ubuntu 10.10. If needed I can install 64-bit Ubuntu 10.04 and rebuild the 64-bit version. Just let me know if you run into glibc problems.

James Heinrich · 2011-02-08, 18:45

I'll repeat my minor feature request for the next version:
When doing P-1 work as Pfactor=, it reports like this:

Code:

[Feb 8 13:37] Optimal P-1 factoring of M58020713 using up to 4608MB of memory.
[Feb 8 13:37] Assuming no factors below 2^69 and 2 primality tests saved if a factor is found.
[Feb 8 13:37] Optimal bounds are B1=685000, B2=18837500
[Feb 8 13:37] Chance of finding a factor is an estimated 6.38%

Which is good. But if I specify the bounds with Pminus1=, it does not give the probability:

Code:

[Feb 8 13:37] P-1 on M334000013 with B1=8250000, B2=250000000

That's all it says. Can you please add the line that says "Chance of finding a factor is an estimated 7.39%"?

tichy · 2011-02-08, 19:09

Shouldn't the gwnum.a library contain the gwnum.o object ? I tried the official makefiles and it seems that its absence is causing ld to fail. OTOH, when I use the cmake build system, where gwnum.c is compiled in the process, everything links ok.
My bad - forgot about the makefile in the gwnum folder.

tichy · 2011-02-08, 20:25

Maybe the libcurl static linking dependencies problems could be mitigated by having mprime sources being distributed along with libcurl ones as a single archive. There are many projects employing such scheme, so maybe mprime could follow such approach too. Bulding mprime would involve creating static libcurl along the way.

Prime95 · 2011-02-08, 22:52

Quote:

Originally Posted by James Heinrich

I'll repeat my minor feature request for the next version. Can you please add the line that says "Chance of finding a factor is an estimated 7.39%"?

That would involve changing the P-1 worktodo line. I need to know how far the number has been factored to give an accurate probability.

James Heinrich · 2011-02-08, 23:08

Quote:

Originally Posted by Prime95

That would involve changing the P-1 worktodo line. I need to know how far the number has been factored to give an accurate probability.

Any harm in adding that as an optional 8th parameter? (Pminus1=[id,]k,b,n,c,B1,B2[,tf])

Christenson · 2011-02-09, 13:25

Quote:

Originally Posted by Christenson

Hi Prime95...
Elsewhere, you suggested I try 26.4 for not getting six cores automagically recognized...I haven't been able to do that just yet...should I just jump to 26.5 and try that?

Meanwhile, six cores crunch away...real LL results in a month or so....patience, patience...

Quote:

Originally Posted by Prime95

Go straight to 26.5 unless you're using Linux 32-bit. I hope to get that built tomorrow.

On a six-core, 64 bit machine, I need help understanding why I might want to fool with 32 bit....except as a developer of 32-bit things.

James Heinrich · 2011-02-09, 13:33

Quote:

Originally Posted by Christenson

On a six-core, 64 bit machine, I need help understanding why I might want to fool with 32 bit

You don't. 32-bit is only for ancient beasts that can't run 64-bit.

Wizzard · 2011-02-09, 15:21

Stupid question, but, why is 26.5 size 25 MB and 25.11 only 5 MB? :)

Brain · 2011-02-09, 17:14

Quote:

Originally Posted by Wizzard

Stupid question, but, why is 26.5 size 25 MB and 25.11 only 5 MB? :)

More optimizations. This question had been answered before somewhere else in this forum in more detail.

James Heinrich · 2011-02-09, 17:32

Quote:

Originally Posted by Wizzard

Stupid question, but, why is 26.5 size 25 MB and 25.11 only 5 MB? :)

Previously discussed in other v25.x threads, such as here:
http://www.mersenneforum.org/showthr...089#post238089

2011-02-08, 18:45	#24
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 6535₈ Posts	I'll repeat my minor feature request for the next version: When doing P-1 work as Pfactor=, it reports like this: Code: [Feb 8 13:37] Optimal P-1 factoring of M58020713 using up to 4608MB of memory. [Feb 8 13:37] Assuming no factors below 2^69 and 2 primality tests saved if a factor is found. [Feb 8 13:37] Optimal bounds are B1=685000, B2=18837500 [Feb 8 13:37] Chance of finding a factor is an estimated 6.38% Which is good. But if I specify the bounds with Pminus1=, it does not give the probability: Code: [Feb 8 13:37] P-1 on M334000013 with B1=8250000, B2=250000000 That's all it says. Can you please add the line that says "Chance of finding a factor is an estimated 7.39%"? Last fiddled with by James Heinrich on 2011-02-08 at 18:45

2011-02-08, 19:09	#25
tichy Nov 2010 1001100₂ Posts	Shouldn't the gwnum.a library contain the gwnum.o object ? I tried the official makefiles and it seems that its absence is causing ld to fail. OTOH, when I use the cmake build system, where gwnum.c is compiled in the process, everything links ok. My bad - forgot about the makefile in the gwnum folder. Last fiddled with by tichy on 2011-02-08 at 19:37

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2011-02-08, 20:25	#26
tichy Nov 2010 4C₁₆ Posts	Maybe the libcurl static linking dependencies problems could be mitigated by having mprime sources being distributed along with libcurl ones as a single archive. There are many projects employing such scheme, so maybe mprime could follow such approach too. Bulding mprime would involve creating static libcurl along the way.

2011-02-09, 15:21	#31
Wizzard Feb 2011 Bratislava 11011₂ Posts	Stupid question, but, why is 26.5 size 25 MB and 25.11 only 5 MB? :)