Sieving Riesel & Sierp base 16

gd_barnes · 2009-11-10, 04:56

Hey all,

I'm currently sieving Riesel and Sierp base 16 together for the remaining unreserved k's for n=200K-500K as a slightly lower priority effort. The optimum sieve depth for breaking off n=200K-300K is P=12T. This assumes the very likely possibility that we won't complete testing both drives to n=300K within ~1 year and so only takes into account the rate of factor removal from the n=200K-300K portion of the file; not the entire file.

I'm not going to make a formal sieving drive out of it but if anyone would like to help, please post a reservation here.

The file sieved to P=8T is attached to this posting. I'll remove factors from it as we progress. It takes one 64-bit 2.4 Ghz core ~5 days to sieve a P=1T range using 64-bit sr2sieve.

When we're at P=12T, I'll remove the n=200K-300K part of the file and post some files in the Riesel base 16 drive for testing. When/if we find some more primes on Sierp base 16 before reaching n=200K, I'll remove those k's from the file. We can also continue sieving n=300K-500K as a very low priority effort if anyone wants to.

These are good bases to run the much faster-testing power-of-2 bases. Iirc, even with the new PFGW, as a general rule, I've found that they test ~2.5-3 times faster than non-power-of-2 bases for the same size k-value and # of digits. (Yes, the smaller k-values can test much faster than the larger ones, even on non-power-of-2 bases using the new PFGW.)

Reservations:

Code:

gd_barnes      P<=3T       complete
Flatlander     P=3T-4T     complete
gd_barnes      P=4T-5T     complete
Flatlander     P=5T-8T     complete
gd_barnes      P=8T-12T    complete
(Sieving is paused as we break off and test n=200K-300K.)

Gary

Flatlander · 2009-11-11, 23:05

Taking 3T-4T.

Where is the file?

gd_barnes · 2009-11-12, 06:14

I wasn't going to post it until I found out if there was any interest. I've now attached it to the 1st posting here. Thanks for helping.

Gary

gd_barnes · 2009-11-13, 22:19

P=2T-3T is done. Taking P=4T-5T.

Flatlander · 2009-11-15, 19:48

Taking 5T-6T.

Flatlander · 2009-11-17, 23:59

Taking 6T-7T.

Flatlander · 2009-11-18, 14:45

3T-4T is complete.

gd_barnes · 2009-11-21, 21:51

P=4T-5T is complete. I'll reserve more later next week after getting back from a business trip.

Flatlander · 2009-11-21, 22:26

5T-6T is complete.

Flatlander · 2009-11-23, 23:21

6T-7T is complete.

Taking 7T-8T.

Flatlander · 2009-12-02, 00:28

7T-8T is complete.
Due to hardware issues I've had to go back to 32bit Windows, so I won't be sieving for a while.

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2009-11-11, 23:05	#2
Flatlander I quite division it "Chris" Feb 2005 England 31·67 Posts	Taking 3T-4T. Where is the file?

2009-11-12, 06:14	#3
gd_barnes May 2007 Kansas; USA 2×5,153 Posts	I wasn't going to post it until I found out if there was any interest. I've now attached it to the 1st posting here. Thanks for helping. Gary

2009-11-13, 22:19	#4
gd_barnes May 2007 Kansas; USA 2842₁₆ Posts	P=2T-3T is done. Taking P=4T-5T.

2009-11-15, 19:48	#5
Flatlander I quite division it "Chris" Feb 2005 England 31·67 Posts	Taking 5T-6T.

2009-11-17, 23:59	#6
Flatlander I quite division it "Chris" Feb 2005 England 31·67 Posts	Taking 6T-7T.

2009-11-21, 21:51	#8
gd_barnes May 2007 Kansas; USA 10100001000010₂ Posts	P=4T-5T is complete. I'll reserve more later next week after getting back from a business trip.