20060921, 22:28  #1 
Nov 2003
7046_{8} Posts 
Other Primes
I thought it would be nice to have a thread discussing primes found by others, or by us but not related to RPS.
And the first one is 2^12037932^601897+1 (362378 digits) new Gaussian Mersenne norm record set by Cruelty. More details can be found here Congratulations! The form can be searched using the latest version of LLR (3.7.x). I tried once at 400k but it was a bit time consuming (on my laptop) and I gave up. 
20060921, 23:02  #2 
Nov 2004
California
2^{3}·3·71 Posts 
Earlier this month I found 99*10^1396701, the new Nearrepdigit record. In fact, 10 of the top 20 for this form have been entered in the last
23 months. 
20061011, 03:16  #3 
Nov 2003
2·1,811 Posts 
Badges marking the latest 9.8Mdigit Mersenne prime are available in this thread. Sign up there if you'd like to have one.

20061116, 21:57  #4 
May 2005
2·809 Posts 
(2^1127239+2^563620+1)/5 is 3PRP!, which AFAIK is the largest GQ so far
The question I have now is, how to prove it is, or it is not a prime BTW: I don't consider using PRIMO or other ECPP based software for this purpose as it would take more than my life to complete 
20061120, 01:55  #5 
Nov 2003
2·1,811 Posts 
Replies to the above post moved to a separate thread:
GQ(1127239) is PRP! Please post further replies there. 
20061202, 18:35  #7 
Nov 2003
E26_{16} Posts 
Yes, huge
26773*2^24653431, 742147 digits. 20th of all times! Note that now an entry to Top100 requires binary exponent n>1.2M ! 
20070117, 11:39  #8 
Jun 2003
Oxford, UK
11101011100_{2} Posts 
Monster
Someone, outside of this group I think has posted a monster
http://primes.utm.edu/primes/page.php?id=79192 21st largest prime every found!!! 
20070117, 12:44  #9 
Nov 2003
2×1,811 Posts 
That's L191, S. Banka who is (unfortunately ) not with us. He found 5 large primes in only one year, he began with 12121 project but now he is testing k=737 (=11*67) alone. He is now 13th by score!:surprised 4 of his 5 primes are currently in top100, only Cooper and Heuer have more primes in top100 while Grobstich has 4 too.
Last fiddled with by Kosmaj on 20070117 at 12:46 
20070117, 12:57  #10 
Feb 2003
11101110001_{2} Posts 
... and Thomas has 4 in the Top101.
Last fiddled with by Thomas11 on 20070117 at 13:01 
20070125, 14:46  #11 
Nov 2003
2·1,811 Posts 
Congrats to David Underbakke (L99) who just reported new largest SophieGermain pair (51910 digits):
48047305725*2^1724031 48047305725*2^1724041 Only 10 days after the new twin record! 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Mersenne Primes p which are in a set of twin primes is finite?  carpetpool  Miscellaneous Math  3  20170810 13:47 
Distribution of Mersenne primes before and after couples of primes found  emily  Math  34  20170716 18:44 
Conjecture about Mersenne primes and nonprimes v2  Mickey1  Miscellaneous Math  1  20130530 12:32 
A conjecture about Mersenne primes and nonprimes  Unregistered  Information & Answers  0  20110131 15:41 
possible primes (real primes & poss.prime products)  troels munkner  Miscellaneous Math  4  20060602 08:35 