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 2006-06-08, 01:07 #1 masser     Jul 2003 Behind BB 7E816 Posts look what double checking uncovered... 78398*5^19313+1 is prime! 107258*5^19517+1 is prime!
2006-06-08, 02:29   #2
rogue

"Mark"
Apr 2003
Between here and the

7,487 Posts

Quote:
 Originally Posted by masser 78398*5^19313+1 is prime! 107258*5^19517+1 is prime!
Nice. I will be freeing up one of my resources this weekend, so I can devote some time to this project again. Sieving will have to wait, but at least I should be able to look for new primes.

 2006-06-08, 03:06 #3 Citrix     Jun 2003 7·233 Posts Is there a way to reserve ranges in the double check effort? Is it open to the general public?
 2006-06-08, 22:11 #4 grobie     Sep 2005 Raleigh, North Carolina 337 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?
 2006-06-09, 00:05 #5 masser     Jul 2003 Behind BB 23·11·23 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.
 2006-07-17, 17:13 #6 masser     Jul 2003 Behind BB 37508 Posts 111688*5^33840+1 is prime!
2006-07-17, 18:54   #7
michaf

Jan 2005

479 Posts

Quote:
 Originally Posted by masser 111688*5^33840+1 is prime!
I actually don't know if I like this one :>
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?

2006-07-17, 20:06   #8
jasong

"Jason Goatcher"
Mar 2005

66638 Posts

Quote:
 Originally Posted by michaf I actually don't know if I like this one :> 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?
Maybe people need to start turning in their residuals. I think that's what they're called. I mean the unique string of characters that gets associated with every test.

 2006-07-21, 17:09 #9 axn     Jun 2003 2×7×17×23 Posts 278594*5^40528-1 is prime! Last fiddled with by axn on 2006-07-21 at 17:09
 2006-07-24, 17:24 #10 axn     Jun 2003 2·7·17·23 Posts 280292*5^41864-1 is prime!
 2006-07-31, 18:09 #11 axn     Jun 2003 2·7·17·23 Posts Third doublecheck prime 234226*5^44705-1 is prime!

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