20080215, 01:16  #45 
Mar 2006
Germany
2×3×5^{2}×19 Posts 
even Riesel:
k=14361, 19401 and 20049 at n=300k (even) 
20080218, 17:27  #46 
May 2004
FRANCE
1000110000_{2} Posts 
Another Riesel base 2  odd n prime.
On 01/02/2008, I found :
288234*2^2249761 is prime! Time : 290.692 sec. which is 144117*2^2249771 Now, only 16 k's are remaining All these remaining k's have been tested at least up to n = 256K (262144). Jean 
20080218, 18:23  #47 
May 2004
FRANCE
230_{16} Posts 
New status for Riesel base 2 odd n
From "regular" primes thread :
288234*2^2249761 is prime! Time : 290.692 sec. which is 144117*2^2249771 Now, only 16 k's are remaining Also, I reached the 256K limit for : k = 133977, n = 262029, no prime k = 145257, n = 261781, no prime k = 147687, n = 261881, no prime k = 148323, n = 262079, no prime k = 154317, n = 262065, no prime k = 155877, n = 262085, no prime So, I am unreserving these k's for now (but perhaps would reserve some of them later...). Regards, Jean 
20080218, 20:16  #48  
May 2007
Kansas; USA
27EB_{16} Posts 
Quote:
Welcome back from vacation! It's always nice to come back to a prime. Per a previous posting, I show k=39687 only tested to n=253.1K. Is that correct? Thanks, Gary Last fiddled with by gd_barnes on 20080218 at 20:30 Reason: Remove reservation question answered in other post 

20080218, 22:02  #49  
May 2004
FRANCE
2^{4}·5·7 Posts 
Yes, I forgot it!
Quote:
I am restarting it now from this point... Thanks, Jean 

20080219, 15:24  #50  
May 2004
FRANCE
1000110000_{2} Posts 
k = 39687 now tested up to 256K (Riesel odd n's)
Quote:
k = 39687, n = 261837, no prime... so, I am also unreserving this k for now. I shall now try to make some further sieving on the 16 remaining k's... Regards, Jean 

20080219, 20:59  #51 
May 2004
FRANCE
2^{4}·5·7 Posts 
New status for Sierpinski base 2  even n's
Here is today's status for Sierpinski base 2  even n's (which is half of remaining k's for Sierpinski base 4) :
k = 23451 is up to n = 1,977,272 no prime... k = 60849 is up to n = 1,940,034 no prime... Regards, Jean 
20080220, 16:39  #52 
May 2004
FRANCE
2^{4}·5·7 Posts 
Riesel base 2 odd n's sieving ; reserving one k
I am now sieving the 16 remaining k's for Riesel base 2 odd n's (in conjonction with Riesel base 4) from n = 256K to 2048K base 2, using srsieve, and shall distribute the sieve files in Newpgen format when sieved enough(at least p = 100 billions)...
For now, I wish to reserve again k = 155877 (in conjonction with k = 311754 for base 4) for LLR testing up to n = 512K (524288) base 2, or, I hope, prime found below... Regards, Jean 
20080220, 17:01  #53  
May 2007
Kansas; USA
11·929 Posts 
Quote:
Do you know that I tested Riesel base 2 oddn k=6927 to n=600K base 2? That was done in conjuction with Riesel base 4 k=13854 to n=300K base 4. But if you want to include the range as a doublecheck in your sieved file(s), that works for me. Gary 

20080220, 17:39  #54  
May 2004
FRANCE
2^{4}·5·7 Posts 
Quote:
Jean 

20080224, 19:26  #55 
May 2004
FRANCE
2^{4}·5·7 Posts 
Riesel base 2 odd n's ; reserving another k.
I wish to reserve k = 39687 (in conjonction with k = 79374 for base 4) for LLR testing up to n = 512K (524288) base 2, or, I hope, prime found below...
Jean P.S. My sieving is progressing fine... 
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