20160930, 03:35  #1 
Sep 2008
Kansas
2×31×53 Posts 
Team sieve for OPN  70841^531
Tracking Odd Perfect Number (OPN) 70841^531.
I performed some quick heuristics, not so much to get an estimate but to get a feel for the division of a and r side processing. The following table is built with test sieving of 2000 (specialq) blocks. Not very representative but enough to show a trend. The first number is the ratio of rel/Q and the second is the percent increase in time (sec/rel). The base time @ 40M is within one percent between a & r so the base is nearly identical. Code:
specialq > 40M 100M 150M 200M algebraic side 2.76/ 2.19/32 1.57/55 1.63/74 rational side 2.48/ 2.17/18 1.75/42 1.78/62 Code:
# sieve with gnfslasieve4I15e. # OPN 70841^531 n: 1639870874590419433710052519894739183040918246691564654028160232651507013803494814368275258694299678055272788457973905696251342961581573918058718878360631706916568162337627046488755367758046805318319744365426748357609314760174184516928504686504427003173 skew: 1 c0: 70841 c6: 1 Y0: 44932661921134788129101965278651904868535161 Y1: 1 lpbr: 32 lpba: 32 mfbr: 64 mfba: 64 alambda: 2.6 rlambda: 2.6 alim: 200000000 rlim: 200000000 Code:
gnfslasieve4I15e f <start_of_range> c <length_of_range> o <output_file_name> r 70841_53.poly (I like to watch the progress.) In case a restart is needed in the range, add the R switch. (All range numbers must be full decimal representations. i.e., 42M = 42000000) Since ggnfs is single thread, multiple copies need to be run at the same time to utilize multiple cores. Be sure to use a different output_file_name for each range. Something like 70841_40M as signifying the starting point. The output files can be placed at any of the file sharing services: DropBox, RapidShare, SendSpace, etc. To start things off I'll take 4066M on the r side. Remember, the a side is already at 123.3M. 
20160930, 06:08  #2 
"Curtis"
Feb 2005
Riverside, CA
2×2,339 Posts 
I'll take 6675M.

20160930, 15:21  #3 
"Dave"
Sep 2005
UK
2·19·73 Posts 
I'll take 7591M on the r side.
Last fiddled with by amphoria on 20160930 at 15:54 Reason: Decided to take half based on initial sieving 
20161001, 02:51  #4 
Sep 2008
Kansas
2·31·53 Posts 
Whoa, bit off more than I thought. Looks like better than two weeks and it will be 78 days before my first results will be reported. I think the regulars are snickering knowing this is going to be several months of processing.

20161001, 03:51  #5 
"Curtis"
Feb 2005
Riverside, CA
1001001000110_{2} Posts 
My reservation will be 3+ weeks as well, 3M each on 3 cores.

20161007, 10:54  #6 
"Dave"
Sep 2005
UK
2×19×73 Posts 
Taking 91107M on the r side.

20161007, 11:08  #7 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK
31·157 Posts 
First post should have a trackdown of the reservations.

20161008, 11:18  #8 
"Dave"
Sep 2005
UK
101011010110_{2} Posts 
After cat'ing the files together and running through remdups4, this yielded 33.3M relations. They can be downloaded from 70841_75M.7z.
Last fiddled with by amphoria on 20161008 at 11:20 
20161011, 19:29  #10 
Sep 2008
Kansas
CD6_{16} Posts 
Taking 107123M on the r side.

20161014, 11:01  #11 
"Dave"
Sep 2005
UK
101011010110_{2} Posts 
Taking 123139M on the r side.

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