20071125, 10:01  #34 
Jan 2005
479 Posts 
You can take them,
I cannot get to the computer I tested them on right now, but my guess is that I updated the webpage when I stopped searching. Good luck! and @Gary: apologies accepted, I think the comments were made with the best intentions :) As for including or not: You might want to just a sidenote telling the story, it'll be clear to everyone then. Last fiddled with by michaf on 20071125 at 10:04 
20071126, 05:21  #35  
May 2007
Kansas; USA
2·5,153 Posts 
Quote:
As I get into creating the page, I'll ask people's input about what they think looks the best. Gary 

20071205, 20:16  #36 
Jan 2006
Hungary
268_{10} Posts 
Found some.
Aloha everyone.
I have some results: 5659*22^97758+1 is probable prime 6462*22^45507+1 is probable prime 1013*22^260671 is probable prime 2853*22^279751 is probable prime 4001*22^366141 is probable prime Having fun, Willem.  Sierpinski / Riesel  Base 22 Conjectured Sierpinski at 6694 [5,23,97] Conjectured Riesel at Riesel 4461 [5,23,97] Sierpinski 22 (cedricvonck) 484 (cedricvonck) 1611 (Willem tested upto 98000) 1908 (Willem tested upto 60000) 4233 (Willem tested upto 30000) 5128 (Willem tested upto 30000) Riesel 3104 (willem tested upto 60000) 3656 (willem tested upto 60000) 
20071206, 03:00  #37  
May 2007
Kansas; USA
10100001000010_{2} Posts 
Quote:
Great work, Willem! And a top5000 prime to boot! Keep us posted on your progress. I'm accumulating all of the info. for bases <=32 into a master spreadsheet that I am using to slowly create some web pages. Question...were you able to prove the primes? Although it's slow, I use Proth. Thanks, Gary 

20071206, 20:34  #38 
Jan 2006
Hungary
10C_{16} Posts 
Aah, proving prime with some other program. I didn't think so far ahead yet. Ok, I have proth running now.
Thanks for the tip, laters, Willem. 
20071206, 21:52  #39 
"Mark"
Apr 2003
Between here and the
1100001100100_{2} Posts 
You should be able to prove these prime with WinPFGW and it will be much faster than Proth. Use the tp or tm switch (depending upon 1 or +1, although I don't recall which switch is used with which sign). Combine it with f0 and you should be all set.

20071207, 00:37  #40  
Jun 2003
2^{3}·607 Posts 
Quote:
Vice versa for tm Quote:
Last fiddled with by axn on 20071207 at 00:39 Reason: Added documentation excerpt 

20071207, 00:52  #41  
Mar 2003
New Zealand
10010000101_{2} Posts 
Quote:
edit: The quote above has been edited, see the original post. Last fiddled with by geoff on 20071207 at 00:55 

20071207, 07:52  #42  
May 2007
Kansas; USA
2·5,153 Posts 
Quote:
Thanks for responding and clarifying Geoff. I'm wondering what properties those were for base 5 and would they apply to at least 'some' other bases such as base 22? Gary Last fiddled with by gd_barnes on 20071207 at 07:56 

20071207, 07:55  #43  
May 2007
Kansas; USA
2×5,153 Posts 
Quote:
Very good. I should have known as much since I've been using PFGW extensively for these conjecture searches but didn't look into all of its options. Thanks for the heads up. Gary 

20071207, 13:24  #44 
Mar 2006
Germany
B39_{16} Posts 
something like this:
call: pfgw tc q"1468*11^26258+1" output: PFGW Version 20031222.Win_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 1468*11^26258+1 [N1/N+1, BrillhartLehmerSelfridge] Running N1 test using base 2 Running N1 test using base 3 Running N+1 test using discriminant 23, base 1+sqrt(23) Calling N1 BLS with factored part 100.00% and helper 0.02% (300.02% proof) 1468*11^26258+1 is prime! (813.9536s+0.1133s) karsten 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Sierpinski and Riesel number (Fixed k, Variable base)  Citrix  Sierpinski/Riesel Base 5  16  20170209 15:55 
Definition of Sierpinski/Riesel number base b  sweety439  Conjectures 'R Us  32  20161216 22:31 
Sierpinski/Riesel Base 5: Post Primes Here  robert44444uk  Sierpinski/Riesel Base 5  358  20081208 16:28 
Sierpinski/Riesel Base 10  rogue  Conjectures 'R Us  11  20071217 05:08 
Sierpinski / Riesel  Base 23  michaf  Conjectures 'R Us  2  20071217 05:04 