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Old 2003-08-30, 13:00   #1
Wolf
 
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Default 34.5M - 34.7M to 2^62

I'll move on to this range when my current range finishes
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Old 2003-09-04, 18:46   #2
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Just started this range. Each exponent is taking about 29 mins to test on a P3-933 if no factor found.
There are 5065 exponents in this range so this will keep me occupied into next year as the computer is not on 24/7.

I managed to run a few exponents on a P4-2000 to see how it compared to the P3 before the SSE2 code kicks in.
The P4 was only slightly quicker managing to test an exponent in 26 mins.
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Old 2003-09-04, 19:51   #3
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62 bit it's a lot for LMH in this range. I would suggest to reduce the depth to 61 bit at first (take less than 10 min I guess), then you can go deeper or extend the range. So you can obtain more factors within the same time. And after an year your computer (or another one) is maybe much faster, e.g. a cheap Athlon XP, what seems to be the best choice for these jobs below 63 bit factoring depth. My old 1.2G TB is working at the moment at 79M from 61 to 62 bit ( which corresponds to 61 bit in your range) taking 5.5 min per exponent (but also not 24/7). And a new XP (i.e. next year an old one) could do the same job twice as fast.
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Old 2003-09-04, 21:11   #4
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I did consider running to 61 bits first but in the end decided to go straight to 62 bits. The overall test time will be the same.
If I want to speed things up a bit I'll let the P4 run a few exponents.
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Old 2003-09-05, 02:03   #5
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Nooooooo! :(
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Old 2003-09-05, 03:56   #6
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we just had a discussion about p4's running <= 62 bits

check out the last few posts of http://www.mersenneforum.org/viewtopic.php?t=933
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Old 2003-09-05, 05:59   #7
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Quote:
Originally Posted by garo
Nooooooo! :(
I wondered whether my last statement about the P4 would provoke a response. It seems it did :)

I've read, even understood, all the comments about P4 trial factoring efficiency and agree it would not be getting the best out of it, but both computers are at work and I consider getting any GIMPS related work out of them a bonus. I do not run any first time LL tests on the P4 although I have done a few doublechecks and trial factoring to 2^67. At the moment I've got it running ECM so switching it a this range for a while will not hurt GIMPS too much.
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Old 2003-09-05, 06:15   #8
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You could probably see by the profusion of emoticons that I was half kidding!! That was mock horror! Of course, you should do as you see fit.
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Old 2003-12-08, 20:18   #9
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This range is now complete. Last block of results still to be submitted due to the Manual Test Pages being switched off If they are not back on line soon I'll email the results direct to George.

186 factors found in total, including 2 for the same exponent :-

M34527061 has a factor: 2730132808164814607
M34527061 has a factor: 2467611803533892129
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