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2007-12-27, 22:12   #243
gd_barnes

May 2007
Kansas; USA

33×17×23 Posts
Dec. month end status

Here is my status for Dec. month-end for k's > 300 for record here. The primes shown are only those found since the Nov. month end status.

Quote:
 k=2145: test limit: 525K no primes this month k=19437, 102765, 3545685, 111546435, 115029915, 120023475, 290499495, 686701125, 775784295, 968911515, 1019370495, and 3428677395: test ranges: 0-278.2K and 328K-377.5K primes k / n(s): 19437: none 102765: none 3545685: 269737, 271428 111546435: none 115029915: 269264*, 272429* 120023475: none 290499495: 270189 686701125: none 775784295: 274938 968911515: 274697 1019370495: 267809 3428677395: 272013
* - confirmed prime(s) previously found by others

No top-5000 primes this month.

For a more complete list, see my new Riesel primes found and testing ranges web page here.

The following ranges searched are exceptions to the above that include ranges that have been previously searched by others:

k=111546435: -377.5K (all ranges tested)
k=115029915: -385K (all ranges tested)

Gary

 2007-12-31, 14:32 #244 AES   Jul 2007 Tennessee 25×19 Posts 3015015*2^n-1 is prime for n = 222978, 230010, 237426, 242126, 276613, 295918, 313325, 320385, 330143
 2008-01-01, 13:11 #245 Templus     Jun 2004 6A16 Posts report on k=25935 k*2^n-1 for k=25935 has been sieved until 2.5T with 93000 tests left I doublechecked all primes reported by phatfil until n=220k. Testing now completed until n=235k, and the 97th prime for this k is found: 25935*2^224175-1
 2008-01-01, 17:56 #246 kar_bon     Mar 2006 Germany 55608 Posts please check hi templus, please check 'your' 97th prime with this from the summary: 1, 3, 4, 9, 10, 11, 12, 16, 19, 21, 23, 25, 29, 32, 33, 35, 44, 48, 64, 80, 82, 99, 100, 101, 128, 132, 141, 155, 170, 201, 213, 339, 570, 573, 623, 698, 721, 811, 826, 964, 1120, 1173, 1185, 1225, 1324, 1329, 1392, 1775, 2056, 2576, 2631, 3045, 3488, 3609, 3803, 4653, 4902, 5064, 5210, 5931, 6013, 6978, 7429, 8163, 8316, 9460, 11476, 12448, 13205, 16282, 19583, 22209, 26443, 28532, 29326, 32689, 34226, 42832, 44325, 46144, 47396, 54956, 67599, 69182, 69625, 75563, 81684, 83898, 84676, 91943, 92016, 101560, 117344, 121855, 139225, 152803, 173518, 219995, 224175(=99th prime!!!). (while 15k.org is down) thanks karsten
 2008-01-01, 18:17 #247 Templus     Jun 2004 2×53 Posts Hello Karsten, You are right, for some reason I must have missed the primes for n=4 and n=9...
 2008-01-02, 00:38 #248 grobie     Sep 2005 Raleigh, North Carolina 337 Posts Update for k=55951335 166288 is prime 178300 is prime testing completed to n=184180
 2008-01-03, 21:24 #249 VBCurtis     "Curtis" Feb 2005 Riverside, CA 11×461 Posts 2175 274393 and 2055 277335 are prime. My 2000's reservations are complete to 280k. (2055, 2085, 2115, 2175) -Curtis
 2008-01-11, 04:26 #250 VBCurtis     "Curtis" Feb 2005 Riverside, CA 11×461 Posts 2175 301200 is prime. My 2000's (4 of them) are complete to 300k now. -Curtis
 2008-01-20, 18:21 #251 sjtjung     Mar 2006 Columbus, OH 1158 Posts 2085 290460 is prime...(part of curtis' 2000's) found it last month, and forgot to report it.
 2008-01-29, 08:09 #252 gd_barnes     May 2007 Kansas; USA 33·17·23 Posts k=2145 is now complete to n=600K. All primes previously reported. I am unreserving this k.
2008-02-01, 00:25   #253
gd_barnes

May 2007
Kansas; USA

33·17·23 Posts
Jan. month end status

Here is my status for Jan. month-end for k's > 300 for record here. The primes shown are only those found since the Dec. month end status.

k=2145: complete to n=600K and unreserved; no primes this month

Quote:
 k=19437, 102765, 3545685, 111546435, 115029915, 120023475, 290499495, 686701125, 775784295, 968911515, 1019370495, and 3428677395: test ranges: 0-290K and 328K-389K primes k / n(s): 19437: none 102765: 387776 (new prime previously reported) 3545685: 378703 (new prime previously reported) 111546435: 289259* 115029915: 288710* 120023475: 381138 (new prime previously reported) 290499495: none 686701125: none 775784295: none 968911515: none 1019370495: none 3428677395: none
* - confirmed prime(s) previously found by others

A strangely dormant month for k < 333.3K!

For a more complete list, see the Riesel primes found and testing ranges web page here.

The following ranges searched are exceptions to the above that include ranges that have been previously searched by others:

k=111546435: -389K (all ranges tested)
k=115029915: -389K (all ranges tested)

Gary

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