mersenneforum.org Riesel Primes k*2^n-1, k<300 [Part II]
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 2007-11-01, 19:48 #78 sjtjung     Mar 2006 Columbus, OH 7710 Posts update 207 is pausing, focusing all 3 cores on 31 (630k-570k) P4 LLRing 31 at 645k (750k-800k) Sempron LLring at 751k (870k and up) Celeron LLRing at 871k -Steven
2007-11-01, 21:55   #79
Kosmaj

Nov 2003

2×1,811 Posts

Steven, I'm not sure how to interpret your first line:

Quote:
 (630k-570k) P4 LLRing 31 at 645k
Does it mean you tested the 570-645k range?

 2007-11-02, 03:31 #80 gd_barnes     May 2007 Kansas; USA 236228 Posts nice big one for k=243 After just a little more than 3 days of searching n=500K-600K on core #4 of my k=243 search, I finally hit pay dirt for all of my gap filling and double-checking efforts. Rob missed a nice one by not searching all of the ranges of k=243 and then going virtually AWOL for nearly 2 years... 243*2^510491-1 is prime (153676 digits) :surprised Nearly 120,000 bits bigger than my previous biggest. This makes a pretty good case for checking all of the ranges, not just the ones shortly before a fftlen increase. I'll call this my payback for a barren double-check stretch of k=289 from n=90K-500K. 4 cores are on it, one each started at n=230K, 333.3K, 400K, and 500K. The ranges completed so far are on my web page. Gary
 2007-11-02, 04:51 #81 sjtjung     Mar 2006 Columbus, OH 7·11 Posts yes. the number inside the parentheses is the exponent which is assigned to the machine. and the there's typo in the first line. it suppose to be 630 to 750k -Steven
 2007-11-02, 05:16 #82 Kosmaj     Nov 2003 2·1,811 Posts David informed me that he tested k=137 all the way to n=2M and stopped there. Cruelty, if you want you can continue frome there...
2007-11-02, 09:17   #83
Cruelty

May 2005

2×809 Posts

Quote:
 Originally Posted by Kosmaj David informed me that he tested k=137 all the way to n=2M and stopped there. Cruelty, if you want you can continue frome there...
Tempting but no thanks

 2007-11-03, 02:06 #84 gd_barnes     May 2007 Kansas; USA 2×5×1,013 Posts k=243 strikes again for n>500K only n=8K larger 243*2^518736-1 is prime! (156158 digits) :surprised Someone really missed the boat on this one!
 2007-11-03, 17:47 #85 VBCurtis     "Curtis" Feb 2005 Riverside, CA 22×3×349 Posts Gary- please post primes in the "post primes here" thread, not in this thread. This is for status updates, not for prime-posting. This keeps threads less cluttered. -Curtis
 2007-11-05, 17:38 #86 amphoria     "Dave" Sep 2005 UK 2·19·73 Posts k=81 Status k=81 at 1025k. Continuing.
 2007-11-05, 17:39 #87 amphoria     "Dave" Sep 2005 UK 2×19×73 Posts k=67 Reserving k=67.
 2007-11-05, 19:32 #88 Flatlander I quite division it     "Chris" Feb 2005 England 31·67 Posts k=147 Reserving k = 147 please.

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