20091003, 03:14  #12 
May 2007
Kansas; USA
2×47×109 Posts 
With the recent huge prime found on Riesel base 6, the optimum sieve depth should now be lower. When the prime is proven and submitted, I'll post the new depth here. My guess is that it will still come in somewhere between 40T and 45T.

20091003, 11:30  #13 
I quite division it
"Chris"
Feb 2005
England
31·67 Posts 
Taking 3539T.

20091003, 12:31  #14 
I quite division it
"Chris"
Feb 2005
England
31×67 Posts 

20091003, 14:42  #15 
May 2007
Kansas; USA
2×47×109 Posts 
I'll remove k=78959 from the posted sieve file later today. Chris, you may want to do that before starting. Thanks for helping out! If the optimum depth turns out to be P=45T, when my range finishes in a couple of days, I'll reserve the rest and put 2 cores on it to finish it up in ~56 days after that.
I'll post the new optimum depth when I update file later today. 
20091003, 21:03  #16 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·4,591 Posts 
I'll do 3943T.
The latest sr2sieve? 1.8.11? I am trying both 1.8.10 and .11. Both work well. ETA Oct 7 39004844249663  51017*6^9646871 41003460163933  51017*6^8621231 ... Last fiddled with by Batalov on 20091003 at 21:25 Reason: (tests) 
20091003, 23:22  #17 
A Sunny Moo
Aug 2007
USA (GMT5)
1869_{16} Posts 
As I recall, 1.8.10 is supposed to be a wee bit faster for sieves containing 5 or more sequences, so you should probably use that for this sieve.

20091004, 00:06  #18 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2×4,591 Posts 
The speeds are within 0.20.5%. In fact sometimes .11 is faster.
P.S. I think that posting a notadditionallysieved file for the 500550K range for PRP testing would be useful for someone. 
20091004, 06:10  #19 
May 2007
Kansas; USA
2×47×109 Posts 
The adjusted optimum sieve depth for breaking off n=500K750K is P=42T. Calculation:
Testing time of an n=675K candidate (70% of 500K750K nrange): 6282 secs. Factor removal rate for the remaining 6 k's at P=32T: 4807 secs. Optimum sieve depth: 6282 / 4807 * 32T = ~42T. Therefore, all needed ranges are now reserved. Batalov, if you only want to do P=39T42T instead of 39T43T, that will be sufficient. Thanks for the extra boost. I have now updated the sieve file in the 1st posting here to remove k=78959. Gary Last fiddled with by gd_barnes on 20091004 at 06:16 
20091004, 06:16  #20  
May 2007
Kansas; USA
2·47·109 Posts 
Quote:
The only thing we're asking is that people finish their ranges in < ~2 weeks. Keep in mind that n>500K ranges will contain all remaining 6 k's whereas the n=370K500K range only contained 4 k's since Lennart had already completed 3 of them. Gary Last fiddled with by gd_barnes on 20091004 at 07:25 

20091005, 11:41  #21 
May 2007
Kansas; USA
10100000000110_{2} Posts 
P=32T35T is complete.

20091005, 17:50  #22 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·4,591 Posts 
3943T complete. 110 factors, expected 102.88.

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