At 13:18 09/06/02 +0000, Brian Beesley wrote: >6972001 and 7076669 are "starred" although the "fact bits" column seems to >indicate that both trial factoring to 2^63 and P-1 have been run. This is >_definitely_ true for P-1 on 7076669, the fact is recorded on my system in >both results.txt & prime.log. So far as 6972001 is concerned, the database >(dated 2nd June) indicates P-1 has been run to a reasonable depth but trial >factoring has only been done through 2^62. My system definitely won't have >done any more trial factoring yet, let alone reported anything, since that >system is set up with v22 defaults i.e. defer factoring on new assignments >until they reach the head of the queue. > >7009609, 7068857 & 7099163 are not "starred" although the "fact bits" column >is one short. The "nofactor" & "Pminus1" databases (dated 2nd July) give >these all trial factored through 2^62 & Pminus1 checked to B1=35000, >B2=297500 (or higher). The P-1 limits seem sensible for DC assignments, but >shouldn't these have been trial factored through 2^63 like most of the other >exponents in this range?
Regarding the "star", I've noticed that if an exponent doesn't need any factoring when you check it out, the "star" pretty much always stays there throughout the entire test. If an exponent does need factoring, the "star" usually disappears after you finish it ( Daran's observations being a counterexample ). However, I have noticed situations where there are discrepancies with the factoring bit depths. Specifically: 7063451 D 63 This one has P-1 factoring done ( which I did ), but is only factored to 2^62 ( instead of 2^63 ). The nofactor.cmp file on the GIMPS status page agrees with this. However, my worktodo.ini says "DoubleCheck=7063451,63,1", which possibly has prevented me from doing trial factoring that I would have otherwise done. Also when I checked out these exponents they had P-1 done, but needed trial factoring to 2^63: 6518503 D* 63 -- DoubleCheck=6518503,62,1 6528541 D* 63 -- DoubleCheck=6528541,62,1 I did the trial factoring on one machine with "Factor=6518503,62", and put them on another machine with "DoubleCheck=6518503,63,1". When I finished the trial factoring, the "star" went away, but the factored depth did not update. I decided to release 6518503 back to the server, and someone else checked it out, and it still looks like "6518503 D* 63", so I fear they may repeat the factoring I did. Was this caused by finishing the factoring with a "Factor=" line instead of a "DoubleCheck=" line? Nick Glover [EMAIL PROTECTED] Computer Science, Clemson University "It's good to be open-minded, but not so open that your brains fall out." - Jacob Needleman _________________________________________________________________________ Unsubscribe & list info -- http://www.ndatech.com/mersenne/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers
