20040421, 15:36  #1 
May 2003
3·97 Posts 
Looking for a volunteer for a dangerous mission...
I am looking for one volunteer for a TF/P1 mission well outside PrimeNet territory. I have been working on a LMH range for some time and was wanting to do some full trialfactoring and some P1 on some of the leftovers. However, my TF computer is busy doing the trialfactoring. I can keep someone supplied with P1 for quite a while. Only one catch, the person doing this P1 would also be doing a bit of TF in the process. If anyone is interested, please let me know.
ThomRuley 
20040422, 04:22  #2 
Oct 2003
Australia, Brisbane
1D6_{16} Posts 
What sort of range of exponents are we looking at?? Is it part of the LMH>79.3M or is it a range below 79.3M and just not on primenet yet?? Also, why are you interested in p1 factoring it??? (I'm not objecting to it being done, I am just curious)
Last fiddled with by dave_0273 on 20040422 at 04:22 
20040422, 04:53  #3 
May 2003
123_{16} Posts 
Excellent questions, dave_0273. First, it is a range under 79.3M but not on PrimeNet (56.557M, to be exact). I have been trialfactoring in this range for about six months or so. Not long ago, the idea occured to me to start testing some of these on a P4 I built last month. However, the computer I have been using for factoring is still tied up with that factoring project and the P4 is tied up testing an exponent. I recently noticed the Mersennearies group and thought someone might be interested in helping me get a few of these ready for LLtesting. Just an idea for someone who wants to be a Mersennary but wants to avoid competing with other Mersennearies for exponents.

20040424, 17:09  #4 
Oct 2003
Australia, Brisbane
111010110_{2} Posts 
I have to say that it is something that I was alreadying pondering over for my LMH range (4445M). Over the past couple of days since you have posted, I have been giving it even more thought. These are the things that have me nervous.
1. Each exponent would first have to be trialfactored up to 2^70. On my computer (2.4Ghz P4), this would take at least 2 days (very rough estimate) as only 2 exponents are at 70 bit, the remaining 12850 exponents in the 56.5 to 57M range are still only at 63 bit. 2. The p1 test would take at least a day, probably close to 2 days. So, at a guestimate, it would take about 3 days per exponent. In a couple of days when one of my computers finishes the batch of exponents that it is currently working on, I am going to do some proper timings to find out how long it will take per exponent. Last fiddled with by dave_0273 on 20040424 at 17:11 
20040425, 14:37  #5  
Mar 2003
New Zealand
13·89 Posts 
Quote:


20040426, 07:05  #6 
Oct 2003
Australia, Brisbane
2×5×47 Posts 
The only problem with doing it that way is that you would need to keep each of the save files from stage 1 of p1 factoring. Unless of course you mean doing it in that order, but one exponent at a time. In which case, you may as well just do it in the normal order ie fully trialfactor, then fully p1 factor.

20040426, 19:40  #7 
Mar 2003
New Zealand
13·89 Posts 
I was thinking about doing it one exponent at a time, but you could also do all TF to 2^68, then P1 stage 1 and 2, then TF to 2^70. That would probably work out a bit faster than doing all the TF first because a lot more factors will be found in P1 than in the last 2 bits of TF.

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