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-   -   Riesel Primes k*2^n-1, k<300 [Part II] (https://www.mersenneforum.org/showthread.php?t=8621)

sjtjung 2007-11-01 19:48

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

Kosmaj 2007-11-01 21:55

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

[QUOTE](630k-570k) P4 LLRing 31 at 645k [/QUOTE]

Does it mean you tested the 570-645k range?

gd_barnes 2007-11-02 03:31

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. :smile:

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

sjtjung 2007-11-02 04:51

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

Kosmaj 2007-11-02 05:16

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...

Cruelty 2007-11-02 09:17

[QUOTE=Kosmaj;117634]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...[/QUOTE]Tempting but no thanks :wink:

gd_barnes 2007-11-03 02:06

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!

VBCurtis 2007-11-03 17:47

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

amphoria 2007-11-05 17:38

k=81 Status
 
k=81 at 1025k. Continuing.

amphoria 2007-11-05 17:39

k=67
 
Reserving k=67.

Flatlander 2007-11-05 19:32

k=147
 
Reserving k = 147 please.


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