20080124, 20:12  #34  
May 2004
FRANCE
2^{4}·5·7 Posts 
Unreserving k=19464
Quote:
I reserved k=19464 because I believed falsely it might be tested for Riesel odd n's (but 19463 is prime), so, I wish to unreserve it. I tested it up to n = 262032 base 2, then I created a base 4 sieve file up to n=1048576 (1024K) base 4. I will make it available to users by attaching it here. It is sieved up to 49.58 billions. Regards, Jean 

20080124, 20:45  #35 
May 2004
FRANCE
2^{4}·5·7 Posts 
Riesel odd n's : 3 new k's eliminated.
3 new primes found :
130383 104123 260766*2^1041221 is prime! Time : 71.272 sec. 131727 169621 263454*2^1696201 is prime! Time : 79.613 sec. 135567 68325 271134*2^683241 is prime! Time : 23.265 sec. 20 k's remaining now... Also, for Sierpinski base 4 / odd n's, I completed the test of k = 9267 up to 2,000,000 base 2 (the very last n is 1999615), no prime... so, I am unreserving this k. Jean 
20080125, 20:57  #36 
May 2007
Kansas; USA
11·929 Posts 
Riesel oddn reservations
Karsten,
Part of a post from the reservations thread... I'm reserving Riesel base 4 k=13854, 16734, and 19464 for further testing up to about n=250K base 4. This also means I'll be reserving k=6927 and 8367 for the Riesel base 2 oddn conjecture and taking them to n=500K base 2. Gary 
20080128, 08:39  #37 
May 2007
Kansas; USA
11·929 Posts 
A big one drops for oddn...
From the 'regular' primes thread:
Base 2 oddn: 8367*2^3137051 I'm still working on Base 2 oddn k=6927. I'm currently at n=324K base 2. Gary 
20080128, 16:46  #38 
May 2004
FRANCE
1060_{8} Posts 
Gongrats, Gary! Two more prime for me for R. odd n
Very good news, Gary, and many congrats!
I also found two more primes in my range : 100377 231813 200754*2^2318121 is prime! Time : 151.901 sec. 161583 138711 323166*2^1387101 is prime! Time : 157.329 sec. Also, I reached my 256K limit for : k = 86613, n = 262111, no prime... k = 163503, n = 262107, no prime... So, I am unreserving these two k's for now. After your last discovery, there are now 17 k's remaining, 6 of them I tested up to n <= 256K. Regards, Jean 
20080203, 09:32  #39 
May 2007
Kansas; USA
11×929 Posts 
Riesel base 2 oddn status
k=6927 now at n=414K; no primes
testing to n=500K base 2 in conjunction with Riesel base 4 k=13854 
20080203, 10:25  #40 
May 2007
Kansas; USA
11·929 Posts 
Sierp base 2 oddn status
k=37953, 53133, 60357, 70467, 80463, 84363, 85287 all at n=224K.
All going to n=600K or until a prime is found. 
20080206, 22:47  #41 
May 2007
Kansas; USA
11×929 Posts 
Riesel and Sierp oddn statuses
Riesel base 2 oddn k=6927 now at n=500K; no primes. I'll up my test limit to n=600K base 2 in conjunction with Riesel base 4 k=13854.
Sierp base 2 oddn k=37953, 53133, 60357, 70467, 80463, 84363, & 85287 all at n=250K; no primes. Still going to n=600K on all. Gary 
20080211, 20:42  #42 
May 2007
Kansas; USA
11·929 Posts 
Sierp oddn prime and status
Sierp base 2 oddn:
70467*2^268503+1 is prime Sierp base 2 oddn k=37953, 53133, 60357, 80463, 84363, & 85287 all now at n=286K. Gary Last fiddled with by gd_barnes on 20101217 at 10:17 
20080214, 20:45  #43 
May 2007
Kansas; USA
11·929 Posts 
Sierp base 2 oddn:
37953*2^298913+1 is prime Now down to 7 k's remaining. Sierp base 2 oddn k=53133, 60357, 80463, 84363, & 85287 are all now at n=305K; still going to n=600K. Note: I have been doublechecking k=9267 and 32247 along with this so I still have 7 k's in my sieved file. I'll doublecheck them to n=600K along with the rest. If I decide to continue higher than n=600K with the other k's, I'll drop the doublechecking of the 2 k's at that point. Gary Last fiddled with by gd_barnes on 20101217 at 10:17 
20080214, 20:51  #44 
May 2007
Kansas; USA
27EB_{16} Posts 
Riesel base 2 oddn status
Riesel base 2 oddn k=6927 is now complete to n=600K and unreserved. No primes.
It had been tested in conjunction with base 4 k=13854. 
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