P-1 factoring for SOB sieve

[glennpat]

P-1 factoring is in need of mores cores to stay ahead of PRP. I was asked to recruite some team members. So I am posting this and I think it may be a better way to get some SOB Sieve points. The results for P-1 factoring are turned into SOB Sieve. After running SOB Sieve for over a month I learned there was P-1 factoring that may earn us points sooner for SOB Sieve.

I just found a factor for P-1 that should turn into 1.3 million points in about a month. Some of my factors found by Sieveing could take several months to years to turn into major points. Most of them right now are worth only 12 points.

P-1 factoring uses Prime95 with a special ini. Info can be found in thread:

http://www.free-dc.org/forum/showthread.php?t=3239

At the end of the following thread it talks about the need for more P-1 factoring:

http://www.free-dc.org/forum/showthr...t=11294&page=2

The following thread is where I asked about how to get more points and was directed to the P-1 stuff:

http://www.free-dc.org/forum/showthread.php?t=12462

[Paladin]

How about a How_To procedure summary for spooners* (like me)?

I assume step #1 is: register a forum account at free-dc.org.


*meaning "spoon fed" as in net lingo "newbie"

[glennpat]

Step 1: Get an account for the following forum:
http://www.free-dc.org/forum/showthread.php?t=3239

Step 2: In the above forum reserve a small range to start with. The last range I reserved was 14013000 14017000. That may take me about 3 weeks to complete on a Q6400 running at 3.0 Gig.

Step 3: The following link has a "how to list". Ignore the part about how to create a worktodo.ini file for PRIME95. For getting the worktodo.ini file go to the 2nd entry in the thread http://www.free-dc.org/forum/showthread.php?t=3239 . You will see some worktodo.ini zip files. Pick the one that has your range. Edit this file to only include your range to work on. An example of a portion of my worktodo.ini is:

Pminus1=33661,2,14013000,1,120000,1700000
Pminus1=67607,2,14013027,1,120000,1700000
Pminus1=55459,2,14013058,1,120000,1700000
Pminus1=10223,2,14013065,1,120000,1700000

A couple of things in the instruction in the above link is to:

Move the worktodo.ini to folder where PRIME95 is.

Add the following line to the prime.ini file.

results.txt=fact.txt

Step 4: After you start PRIME95 go to its options for the CPU. Set the amount of memory to use. I have mine at 600 meg. When I 1st ran this I was using the default of 8 meg and when my PRIME95 got up to doing Stage 2 it said it did not have enough memory.

Step 5: Factors that are found get submited to: http://www.seventeenorbust.com/sieve/ . Before summiting a factor you have to edit it to be in the following format:

1232968284089849 | 258317*2^17969351+1

Step 6: When range is comple go to thread where reserved range and say it is complete.

Step 7: Here is a link to the stats page http://www.henleyclan.co.uk/sobsieve/alltime/scores.htm . Here is a link to my stats http://www.henleyclan.co.uk/sobsieve...e/ui/13090.htm . In it there is a line like:

Factors next to enter (main) 'active window' (@n=13842150)

The number 13842150 will be increasing as time goes on and is the number where our P-1 factoring should be kept ahead of. The one factor that I have found with P-1 factoring in my stats is:

2126.847T 55459 14001286

In about a few weeks the active window will be up to 14001286 and the points for my factor will be increased.

[[XC] riptide]

Good man Glennpat.

[Joe O]

So where is the influx of factorers?

[[XC] riptide]

Welcome Joe O! For those who may (or may not know) Joe O is a moderator on the Free-DC hosted Seventeen or Bust forums.....

or I'm going slightly mad.

[Joe O]

Welcome Joe O! For those who may (or may not know) Joe O is a moderator on the Free-DC hosted Seventeen or Bust forums.....

or I'm going slightly mad.

Thanks for the welcome.
I'm not going to comment on the second possibility <G>, but I am that Joe O.
I thought that I would try to stir some interest here in P-1 factoring. Glennpat seems to be enjoying himself. We could use a few more people like him.

[Joe O]

Well the first of Glennpat's P-1 factors are beginning to score big:

Largest scores
    p (T)       k         n       Score     Factor found    Score changed  Score was    Score could be  Reqd bias  PRP saved
 9555.392T  10223  14003801  837447.845  Sat 14-Jul-2007  Thu 02-Aug-2007     35.000       5855856.108     238.88        (2)  glennpat
 2126.847T  55459  14001286  837147.071  Fri 06-Jul-2007  Thu 02-Aug-2007     21.268       1302933.098      53.17        (2)  glennpat

[[XC] 4X4N]

Kick ass Glenn

[glennpat]

Thanks for the notice. I'm doing a little more kicking today. I got another 2.5 million points today and we're passing 3 teams. All the crunching is finally generating some real points. I have a couple of more factors that will be upgraded soon. Most of the rest are long ways off.

I am still doing some p-1 so should get some more close factors, but the last range I have been running for 10 days has not turning up one yet.

[glennpat]

I just found a factor using P-1 today. That was kind of a long run without finding one and it sure was nice to see it there. Hopefully there will be a few close together now.

[Paladin]

Are those .ini's 1-to-1 compatible with Linux mprime or should Linux users use Wine (to emulate Win32)?

[Joe O]

Are those .ini's 1-to-1 compatible with Linux mprime or should Linux users use Wine (to emulate Win32)?

Good question! I was wondering about Mprime myself. Why don't you try it and let us know. It would also be interesting to see a speed comparison against Pime95 running under Wine. Again let us know if you try it and what the results are.

[Joe O]

The worktodo.ini.zip files have been updated with the removal of k=33661 and the processing of all submitted factors.