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Old 2004-02-25, 12:14   #1
dave_0273
 
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Oct 2003
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Default Does anyone know.....

Does anyone know how to find exponents, that are above the current double checking leading edge, that need P-1 testing. GP2 posts lists of about 50 exponents or so that need P-1 testing in the Marin's Mersenne-aries forum but I haven't been able to get a hold of him to find out how he does it. There is the file that shows how far exponents have been P-1 trial factored but i don't know how to convert this into a list of exponents that NEED P-1 factoring.
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Old 2004-02-25, 12:21   #2
MrHappy
 
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Possible approach: All exponens from ftp://mersenne.org/gimps/hrf3.zip that are not in ftp://mersenne.org/gimps/pminus1.zip need p-1?
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Old 2004-03-04, 03:14   #3
markr
 
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Quote:
Originally Posted by MrHappy
Possible approach: All exponens from ftp://mersenne.org/gimps/hrf3.zip that are not in ftp://mersenne.org/gimps/pminus1.zip need p-1?
Exactly. Then join to the nofactor file to find how far the exponents were TFd. Then you can make lines like
Pfactor=11744027,64,1
Pfactor=11744153,64,1
Pfactor=11744431,64,1
I don't know how GP2 selected the exponents for each batch; they seemed to be spread across a large range, and the batches overlapped (without having exponents in common).

Last fiddled with by markr on 2004-03-04 at 03:19
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Old 2004-03-04, 11:52   #4
nfortino
 
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I believe GP2 also checks to make sure the assignments are not currently being tested on the primenet server, as it is not fair to find a factor of a number someone is in the middle of testing. Considering you posted exponents in the 13M range, there is a small chance of overlap, but it is good to check.
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Old 2004-03-04, 13:54   #5
dave_0273
 
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Cool. Thanks everyone for your help. I have now written a program to find the exponents that still need P-1 testing. I have also posted ranges in the mersenne-aries forum for other people to do. Thanks again.
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