mersenneforum.org Riesel Primes k*2^n-1, k<300 [Part II]
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 2015-02-18, 00:57 #848 VBCurtis     "Curtis" Feb 2005 Riverside, CA 22·7·132 Posts Reserving k = 249 and k = 109 at 2M. 249 is the k<300 with the lowest largest-known-prime, at 251036. I will test this k just until I find a prime, or lose interest.
2015-02-19, 06:28   #849
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

22·7·132 Posts

Quote:
 Originally Posted by VBCurtis 249 is the k<300 with the lowest largest-known-prime, at 251036. I will test this k just until I find a prime, or lose interest.
Well, that was fast. 249 has a prime at 2001627. I stopped the second core at 2055k, so I'll let the first core finish its 2000-2050 range and unreserve 249 at 2055k in a couple weeks.

 2015-02-28, 20:36 #850 Cruelty     May 2005 65816 Posts k=25 tested till n=3.34M k=43 tested till n=4.32M k=79 tested till n=2.84M k=101 tested till n=4.46M k=151 tested till n=3.93M
 2015-03-01, 06:06 #851 Kosmaj     Nov 2003 1110001001102 Posts I just uploaded the updated k<300 status page. And sorry for the delay. My recent progress: k=21 at n=2890k k=297 at n=2M
 2015-03-24, 15:25 #852 Thomas11     Feb 2003 22×32×53 Posts k=281 complete to n=2M, one prime found (281*2^1860862-1), releasing this k. Taking k=293 from n=1850k to n=2M.
2015-03-28, 12:58   #853
pinhodecarlos

"Carlos Pinho"
Oct 2011
Milton Keynes, UK

5×977 Posts

Latest RPS300 file.
Attached Files
 RPS300.zip (13.7 KB, 71 views)

 2015-03-31, 22:54 #854 Cruelty     May 2005 23×7×29 Posts status report k=25 tested till n=3.37M k=43 tested till n=4.37M k=79 tested till n=2.87M k=101 tested till n=4.5M k=151 tested till n=3.95M
 2015-04-01, 03:28 #855 VBCurtis     "Curtis" Feb 2005 Riverside, CA 22·7·132 Posts 13 @ 3.11M 45 @ 2.15M 93 @ 1.72M 99 @ 2.1M 127@4.15M 167@1.77M 197@ 2M 201@ 1.77M 229@ 1.64M 231@ 1.57M 245@ 2.08M Current resources are 15 haswell cores, 5ish older desktop cores. Each k below 2M has 2 or more cores on it until 2M is reached.
 2015-04-01, 08:13 #856 Thomas11     Feb 2003 190810 Posts k=293 complete to n=2M, no primes, releasing. Taking k=263 from n=1615k to n=2M.
 2015-04-04, 11:58 #857 Thomas11     Feb 2003 22×32×53 Posts k=263 complete to n=2M, one prime found: 263*2^1904406-1, releasing this k. Taking k=233 from n=1710k to n=2M.
2015-04-19, 12:15   #858
pinhodecarlos

"Carlos Pinho"
Oct 2011
Milton Keynes, UK

10011000101012 Posts

Latest RPS300 file.
Attached Files
 RPS300.zip (14.0 KB, 70 views)

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