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 2004-06-10, 15:50 #12 garo     Aug 2002 Termonfeckin, IE 22·691 Posts 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.
 2004-06-10, 16:03 #13 dave_0273     Oct 2003 Australia, Brisbane 1D616 Posts 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
 2004-06-10, 21:58 #14 Mike   May 2004 Vancouver, Canada 22·52 Posts Ok, I'll drop it then :P
 2004-06-12, 02:12 #15 marc     Jun 2004 UK 2138 Posts 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?
2004-06-12, 11:46   #16
hbock

Feb 2003

2438 Posts

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

 2004-06-12, 16:40 #17 marc     Jun 2004 UK 139 Posts 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?
 2004-06-12, 17:13 #18 PrimeCruncher     Sep 2003 Borg HQ, Delta Quadrant 2·33·13 Posts I send the whole file as an attachment.
 2004-06-13, 06:01 #19 markr     "Mark" Feb 2003 Sydney 3×191 Posts 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
 2004-06-18, 11:42 #20 garo     Aug 2002 Termonfeckin, IE 276410 Posts 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
 2004-06-21, 20:01 #21 derekg     Jul 2003 2E16 Posts 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
 2004-06-22, 15:14 #22 tom11784     Aug 2003 Upstate NY, USA 14616 Posts 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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