20040831, 21:38  #265 
Nov 2003
2×1,811 Posts 
Thomas,
CONGRATS! The k=3 huge prime yesterday and the k=11 one today, you cannot deny that these two days have been very lucky for you. Happy hunting! (btw, where are those smilies, cannot find them...) 
20040906, 13:42  #266 
Jun 2003
Oxford, UK
2·7·137 Posts 
15
For the group's information, 15 is now at 505000 with no further primes. Sadly I have this running on a very slow machine.
Regards Robert Smith 
20040913, 19:25  #267 
Feb 2003
1,907 Posts 
11*2^7433221 is prime!

20041011, 08:41  #268 
Nov 2003
2·1,811 Posts 
My recent progress
k=7, checked to n=1012000, in progress
k=13, to 1000000 (1M), stopped k=21, to 760000, in progress k=35, 35*2^2529101 is prime, checked to 360000, in progress k=53, to 520000, stopped k=77, 77*2^3876801 is prime, checked to 388000, in progress Happy hunting to all! 
20041025, 21:10  #269 
Nov 2003
2·1,811 Posts 
k=77
77*2^4415281 is prime!
k=77 checked to 450000, continuing. 
20041103, 00:56  #270 
Nov 2003
2×1,811 Posts 
I'd like to congratulate Jeffrey (L38) on many primes he found recently, including the just reported 47*2^4504701 but I think it will be nice if he can post here the ranges he processed and the ranges he is working on now so that the others can better decide which k to check next. I see that he is actually informing Joss directly (as I don't remember he ever posted in this thread) but with a large delay. I wanted to mail him and tell him this directly but he has no email address listed on his Top5000 biography page. Posting above info will be greatly appreciated and will help the progress of the project.
We have others not reporting either, like g267 (Grobstich) on k=17, 63, 65 and possibly other k's and L33 (Chaglassian) on k=73, 103 etc. but there is little we can do about that. 
20041105, 01:23  #271 
Nov 2003
7046_{8} Posts 
I'm now working on k=55 and after some quick tests I found that
55*2^2180431 is prime. Current status: k=55, to 220k, in progress k=21, to 820k, in progress k=35, to 420k, stopped k=77, to 480k, in progress Happy crunching! 
20041105, 16:50  #272 
Apr 2004
10110111_{2} Posts 
update
Here's my recent activity:
243*2^2063021 is prime! 241*2^n1 200000 to 230000 11/3/4 [none] completed 243*2^n1 200000 to 219000 11/5/4 [206302] continuing to 230000 245*2^n1 200000 to 230000 11/2/4 [none] completed 247*2^n1 200000 to 230000 11/1/4 [none] completed 249*2^n1 200000 to 230000 11/1/4 [none] completed Harvey563 
20041128, 14:12  #273  
Nov 2004
Canada
5 Posts 
Quote:
k=9: at 744k k=33: at 410k k=43: complete to 500k k=51: at 475k (51*2^4684171 is prime!) k=59: at 360k (59*2^3582761 is prime!) k=69: complete to 500k k=105: at 430k k=117: at 363k Completed previously: 47 (500k), 101 (500k), 109 (350k), 119 (500k), 289 (300k) Jeffrey 

20041130, 19:08  #274 
Aug 2002
Minneapolis, MN
2^{2}×3×19 Posts 
Update on k=23
I have tested this one to n=1,000,000! I am still testing it to higher n's 
20041204, 13:13  #275 
Nov 2003
2×1,811 Posts 
Progress Report
Status of k's reserved before:
k=7: [to n=1050000] in progress k=21: [850000] continuing to 1M k=55: prime for n=253047 [280000] continuing to 520k k=77: [520000] in progress The following 7 k's I've been testing in the 210400k range. k=57: 239854 [330000] k=59: 358276 already reported by JCS [400000] k=61: [280000] k=67: [400000] k=83: 216954 [260000] k=85: [370000] k=87: [310000] I "collided" with JCS at k=59 but I was using a machine without permanent access and I couldn't stop it earlier. Last fiddled with by Kosmaj on 20041204 at 13:14 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Is CEMPLLA 1.5 "the only software in the world capable of discovering" something? Not really.  CRGreathouse  Number Theory Discussion Group  51  20181216 21:55 
Something something something... (obviously nor "Riesel Primes")  URoy  Miscellaneous Math  15  20161117 22:52 
Palindrome primes (a.k.a. Elementary S03E03 "Just a Regular Irregular")  Batalov  And now for something completely different  12  20141116 19:03 
Welcome to "Riesel Prime Search"  Kosmaj  Riesel Prime Search  21  20120914 09:51 
Would Minimizing "iterations between results file" may reveal "is not prime" earlier?  nitai1999  Software  7  20040826 18:12 