20081029, 20:26  #155 
I quite division it
"Chris"
Feb 2005
England
31×67 Posts 
29548672*3^96142+1
Is prime. 
20081029, 20:32  #156  
May 2007
Kansas; USA
24047_{8} Posts 
Quote:
Oh, OK. That sounds great. Thanks for the excellent sieving work! 

20081029, 21:48  #157 
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 
@Gary: Ah, I see what you mean. Yeah, that sounds good.

20081029, 22:40  #158 
May 2007
Kansas; USA
19×541 Posts 
I was just thinking of one more thing. To keep the Romannumeral prefixes in sync, so to speak, I think we'll just call the Sierp drive for k=50M100M 'MiniDrive  Sierp base 3 I(b)' after which we'll go II, III, IV, V, etc. I kind of like the idea of Roman numeral prefixes for drives of the same base. Gary 
20081029, 23:45  #159 
I quite division it
"Chris"
Feb 2005
England
31·67 Posts 
9495 and 9596 complete. No primes.
When the n is below 50,000, say, do you think things would be more manageable if the files were available as ks rather than ns? i.e. 3 or 5 ks per file. It would then just be a case of each tester removing the k from their file when they find a prime. Last fiddled with by Flatlander on 20081030 at 00:06 Reason: Removed 'Gary,' to make it a question to anyone. 
20081030, 10:42  #160  
May 2007
Kansas; USA
19×541 Posts 
Quote:
Is 9394 complete? Funny you mention that. That's how I've been doing the conjecture searches over several cores for quite a while now. For instance, I have Sierp base 31 divided up on 2 cores; one running k=~1 to 3.1M and the other k=~3.1M6.2M. Much less duplication of testing that way. I have to think of the best way to design that for a drive. The problem is, one person could end up with 3 k's that never yield a prime over a large nrange. Therefore, it'd have to be something like 3 k's over n=25K50K or something like that. The myriad of situations that could arise has prevented me from running a drive like that yet. The main problem being one person ending up with a file that takes far longer to test than another person; and possibly even longer than they care to continue testing. It would be far easier to administer but a little difficult to manage workload properly. Gary 

20081030, 14:01  #161 
I quite division it
"Chris"
Feb 2005
England
31·67 Posts 

20081102, 13:30  #162 
I quite division it
"Chris"
Feb 2005
England
81D_{16} Posts 
23243282*3^99009+1
Is prime. 
20081103, 21:07  #163 
I quite division it
"Chris"
Feb 2005
England
4035_{8} Posts 
96100 complete.

20081104, 04:49  #164 
May 2007
Kansas; USA
10279_{10} Posts 
Thanks, Chris, for your immense contribution to the base 3 efforts! Last fiddled with by gd_barnes on 20081104 at 04:49 
20081108, 14:53  #165  
I quite division it
"Chris"
Feb 2005
England
31×67 Posts 
Quote:
Is it time to rename and unsticky this thread? 

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