20050228, 13:53  #309 
Jun 2004
2×53 Posts 
k=65
Hi,
after a period of absence on this project, I'm catching up k=65 from n=210k until....? Best Regards, Templus/Ingmar (L75) 
20050301, 06:35  #310 
Nov 2004
California
2^{3}×3×71 Posts 
One more prime for k=231:
231*2^4653911 (140100 digits) 
20050307, 10:56  #311 
Feb 2003
2^{2}×3^{2}×53 Posts 
status for k=75
k=75 has been tested up to n=500000 now, where I'm stopping.
The range n=250000500000 contains the following primes: 75 306789 75 424392 75 434323  Thomas11 (L8) 
20050307, 23:44  #312 
Nov 2004
California
11010101000_{2} Posts 
231 498961
231 has been completed up to n=500k and continuing... 
20050311, 11:25  #313 
Sep 2002
100000110_{2} Posts 
251 359790
This is my first 100,000 digits Joss L15 
20050311, 23:51  #314 
Nov 2004
California
2^{3}×3×71 Posts 
Congrats jocelynl. 231 has also been producing some big ones recently:
231 535713 
20050314, 21:13  #315 
Jun 2004
6A_{16} Posts 
k=65 update
k=65 has been sieved until 123.0 billion (and still sieving).
It has been tested until n=267k. No primes found yet. I am continuing on this k. 
20050315, 21:33  #316 
Sep 2002
106_{16} Posts 
269 264932 is prime!
I'm taking this one to 400k Joss 
20050322, 15:35  #317 
Nov 2003
2×1,811 Posts 
Finally I hit a big one:
21*2^9995991 is prime! 310911 digits currently the 80th largest of all times After testing k=21 from 500k to 950k in increasing order I decided to try the top range from 1M to 995k in reversed order and the prime was right there on line 7 of the file! Achieved limits of this and other k's (no other primes found): k=7: 1.180 M k=21: 950k k=55: 430k k=77: 700k k=79: 520k stopped k=89: 500k Continuing k=55 and k=89 to 520k, k=21 to 1M, k=7 and k=77 until further notice 
20050327, 21:27  #318 
Jun 2004
2·53 Posts 
k=65 update
k=65 has been sieved until 155G and tested until n=305k, no new primes found so far! There are 33800 tests until n=1M left.

20050329, 16:12  #319 
Nov 2003
2×1,811 Posts 
k=89 completed to n=520k and stopped/released. No new primes.
Now I'd like to reserve k=95 and k=165 from 210k. 
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 