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Old 2004-06-10, 15:50   #12
garo
 
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That may not be a good idea. The P4 is very inefficient when factoring under 62 bits. My 1.2GHz Athlon performs 25% better than my P4 2.533.
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Old 2004-06-10, 16:03   #13
dave_0273
 
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I tried my P4 2.4Ghz on LMH but I quickly put an end to that when I found that it was running at about the same speed as my P3 550Mhz. (I think that it was taking about 50 minutes on the P3 and only 40 minutes on the P4). The P4 is so highly optimised using SSE2 that it would be a shame not to use it. The best place for a P4 is on LL testing (either first time or double checking). The P4 just blows everything away.

However, if you are interested in factoring, may I suggest to do factoring through primenet as the mojority of the time factoring these exponents is spent above 64 bit (where SSE2 kicks in). Or if you have a decent amount of RAM, you could join mersenne-aires to do P-1 testing. P4 rip through p-1 tests.

However, although I have just said all of this, in the end it is your computer and you can do whatever work on it that you want. You should do whatever work interests you the most.

As for your time question, based on my computer (a P4 2.4Ghz) it would take me about 25 days or so. (assuming approx 30 minutes per exponent).

Last fiddled with by dave_0273 on 2004-06-10 at 16:06
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Old 2004-06-10, 21:58   #14
Mike
 
May 2004
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Ok, I'll drop it then :P
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Old 2004-06-12, 02:12   #15
marc
 
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OK I'm doing 2650_1294.

This is the first time i've done LMH work so let me check some things.

I usually do Double Checking work so I created a new directory and copied mprime, prime.ini and local.ini.

I added to prime.ini:

UsePrimenet=0
FactorOverride=62
WellBehavedWork=1

I'm currently 33% complete factoring 26500073. Is this all correct so far? Once I'm done I email the results.txt to?
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Old 2004-06-12, 11:46   #16
hbock
 
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Quote:
Originally Posted by marc
OK I'm doing 2650_1294.

UsePrimenet=0
FactorOverride=62
WellBehavedWork=1

I'm currently 33% complete factoring 26500073. Is this all correct so far? Once I'm done I email the results.txt to?
Welcome to LMH ! Settings seem to be correct so far, please send the results directly to George (woltman@alum.mit.edu ).

Last fiddled with by hbock on 2004-06-12 at 11:47
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Old 2004-06-12, 16:40   #17
marc
 
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Do I just email the entire results.txt or do I have to extract the important bits myself?

Should I e-mail it as an attachment or copy paste it into the body of the email?
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Old 2004-06-12, 17:13   #18
PrimeCruncher
 
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I send the whole file as an attachment.
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Old 2004-06-13, 06:01   #19
markr
 
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Welcome to LMH, marc!

For email, I too attach the results. Usually - when there's no rush - I use the PrimeNet manual page, http://www.mersenne.org/ips/manualtests.html. Either way, I strip out the timestamp lines, since George or PrimeNet will anyway and I'm on dialup.

I don't bother with WellBehavedWork=1 when an exponent takes more than ~5-10 minutes to test, but each to their own. I think it really makes more sense when they take very little time each.

Last fiddled with by markr on 2004-06-13 at 06:08
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Old 2004-06-18, 11:42   #20
garo
 
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I am taking 2655_1291. It will take me about a month. I will release the some of exponents if it seems that primenet is catching up too fast.
garo
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Old 2004-06-21, 20:01   #21
derekg
 
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Jul 2003

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Default 26.8-26.9 to 62 bits.

I am taking this range. should be finished in about 2 weeks at the latest. I have half the range done. I started about a week and half ago, but didn't post because I thought I was going to lose access to the computers. There is only 771 exponents to go.

Derek
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Old 2004-06-22, 15:14   #22
tom11784
 
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Aug 2003
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Status of 26.5-27.0M according to 6/21 nofactor:
Code:
      Range        Exponents   Bits   Worker
26500073-26508481      236	62    completed
26508499-26549947     1054      60    marc
26550133-26550841       12      62    completed
26550871-26599999     1277      60    garo
26600051-26640221      968      62    completed
26640359-26649577      246      61    Mr.Happy
26649587-26650633       19      62    completed
26650649-26699381     1222      61    Mr. Happy
26699383-26749997     1247      62    completed
26750029-26753873       89      61    markr
26753887-26799959     1142      60    markr
26800009-26899981     2613      60    derekg
26900009-26933827      849      62    completed
26933833-26933833        1      67    completed
26933903-26956771      570      62    completed
26956819-26991983      912      60    1997rj7


By worker:
1997rj7 ....... 912
marc ......... 1054
markr ........ 1231
garo ......... 1277
Mr.Happy ..... 1468
derekg ....... 2613
Total ........ 8555
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