mersenneforum.org RPS 11th Drive: Search for more megabit primes
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 2011-09-13, 17:14 #12 Thomas11     Feb 2003 3×5×127 Posts I just noticed that k=2039 has already been tested by James P. Burt up to n=1M. He reported the prime 2039*2^841312-1 in 2008. So we will remove this k from the drive. Kosmaj will replace the input files on the server as soon as possible... BTW.: We'll keep the other k=2029 for which pb386 just hit an already known prime (2029*2^673583-1) in the drive, since we do not know how far it was tested.
 2011-09-14, 02:47 #13 Kosmaj     Nov 2003 E2616 Posts 11th Drive test files updated as Thomas said, by removing k=2039. The following drives are now all updated using latest Psieve files of July 31, or later. 1st Megabit 2nd Megabit k=5 k=15 Sieving depths (Thomas, please confirm): p=100P (=1e17) for all n<3M, about p=30P (=3e16) for n>3M, in our case k=5
 2011-09-14, 08:04 #14 pb386     Nov 2003 23×163 Posts 708-712 complete - 3 primes taking 714-718
2011-09-14, 08:10   #15
Thomas11

Feb 2003

3×5×127 Posts

Quote:
 Originally Posted by Kosmaj Sieving depths (Thomas, please confirm): p=100P (=1e17) for all n<3M, about p=30P (=3e16) for n>3M, in our case k=5
Yes, these are the current sieving depths.

2011-09-14, 08:13   #16
Thomas11

Feb 2003

77116 Posts

Quote:
 Originally Posted by Thomas11 BTW.: We'll keep the other k=2029 for which pb386 just hit an already known prime (2029*2^673583-1) in the drive, since we do not know how far it was tested.
I got a reply from justinsane, the finder of 2029*2^673583-1, stating that he can't tell anymore, how far this k was tested.

So, we'll keep it in the drive...

 2011-09-16, 08:52 #17 Thomas11     Feb 2003 111011100012 Posts 712-714 complete, no primes. Taking 718-720.
 2011-09-19, 08:12 #18 pb386     Nov 2003 130410 Posts 714-718 complete - 1 prime taking 720-724
 2011-09-21, 07:59 #19 pb386     Nov 2003 23×163 Posts 720-724 complete - no primes taking 724-728
 2011-09-22, 10:59 #20 Thomas11     Feb 2003 190510 Posts 718-720 complete (1 prime). Taking 728-730.
 2011-09-26, 08:10 #21 pb386     Nov 2003 23·163 Posts 724-728 complete - 5 primes taking 730-734
 2011-09-26, 09:00 #22 Thomas11     Feb 2003 3×5×127 Posts 728-730 complete, 1 prime. Taking 734-736.

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