20060608, 01:07  #1 
Jul 2003
1,327 Posts 
look what double checking uncovered...
78398*5^19313+1 is prime!
107258*5^19517+1 is prime! 
20060608, 02:29  #2  
"Mark"
Apr 2003
Between here and the
2×2,851 Posts 
Quote:


20060608, 03:06  #3 
Jun 2003
2774_{8} Posts 
Is there a way to reserve ranges in the double check effort? Is it open to the general public?

20060608, 22:11  #4 
Sep 2005
Raleigh, North Carolina
337_{10} Posts 
Double Checking
If there is an interest in double checking, maybe another sticky should be started with all the K's that need to be checked so those who do it will be able to reserve k's. This would prevent confusion?

20060609, 00:05  #5 
Jul 2003
52F_{16} Posts 
Double checking is currently an individual process. I started doing it as a test of srsieve and because I suspected that a few primes were missing in the 16384 < n < 32768 range. It's a nice chunk of work for some of my slower machines. I've currently checked all remaining Sierpinski's up to n = 22000, with plans to check up to n = 65536.
If anyone was interested, I would encourage them to sieve the Sierpinski k's for n > 65536, or perhaps start a double check effort for the Riesel k's. 
20060717, 17:13  #6 
Jul 2003
1,327 Posts 
111688*5^33840+1 is prime!

20060717, 18:54  #7  
Jan 2005
479 Posts 
Quote:
IIRC this is the third or fourth prime found in double checking... Should we start double checking everything, or have you taken that task upon you, Masser? 

20060717, 20:06  #8  
"Jason Goatcher"
Mar 2005
5×701 Posts 
Quote:


20060721, 17:09  #9 
Jun 2003
4,591 Posts 
278594*5^405281 is prime!
Last fiddled with by axn on 20060721 at 17:09 
20060724, 17:24  #10 
Jun 2003
4,591 Posts 
280292*5^418641 is prime!

20060731, 18:09  #11 
Jun 2003
10757_{8} Posts 
Third doublecheck prime
234226*5^447051 is prime!

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