20221012, 19:21  #177 
"Jiahao He"
May 2018
China
1000011_{2} Posts 
I reserve M87691 cofactor (prp26371)

20221014, 06:53  #178  
"Jiahao He"
May 2018
China
67 Posts 
Quote:
I have only quad thread laptop Last fiddled with by Grotex on 20221014 at 06:55 

20221022, 00:24  #179 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
3·7·479 Posts 
Ok, will do M87691 cofactor (prp26371)

20221022, 01:58  #180 
Sep 2002
Database er0rr
1000110001111_{2} Posts 
Ryan said he'd do it in this post: https://mersenneforum.org/showpost.p...&postcount=125 Perhaps the task lapsed. (I certified cofactor of M86137 with Primo.)

20221022, 08:05  #181  
Sep 2002
Database er0rr
5·29·31 Posts 
Quote:
Do not advertise numbers in order to try and get other people to do work for you. Just stop it, You have been warned many times about this kind of behaviour. Consider this the last warning. NOTE: Offending post moved to thread for offtopic posts in author's blog. Last fiddled with by Dr Sardonicus on 20221022 at 13:00 

20221125, 05:06  #182  
Sep 2002
Database er0rr
1000110001111_{2} Posts 
Quote:
Reserving the M216317 cofactor (prp65046). Last fiddled with by paulunderwood on 20221125 at 05:07 

20221128, 08:03  #183  
Sep 2002
Database er0rr
5×29×31 Posts 
Quote:
I am now attempting to certify the cofactor of M221509 (prp66673). Last fiddled with by paulunderwood on 20221128 at 09:47 

20221128, 18:49  #184  
Sep 2002
Database er0rr
5×29×31 Posts 
Quote:
Taking W127031. Last fiddled with by paulunderwood on 20221128 at 18:56 

20221128, 19:04  #185 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
2×7×263 Posts 

20221128, 19:06  #186 
Sep 2002
Database er0rr
5·29·31 Posts 

20221128, 19:11  #187 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
E62_{16} Posts 
OK, also you can see https://oeis.org/A092559, current the larger prime factor of 2^A092559(n)+1 have been proven prime for all a(n) up to a(52) = 117239, why you skip a(53) = 120788 and prove a(54) = 127031?

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
15*2^n1, n>1M Reservation Thread  Kosmaj  Riesel Prime Search  707  20211120 19:13 
Where on Earth can I download FastECPP? How fast is it compared with Primo?  Stargate38  Miscellaneous Math  5  20211116 17:33 
5*2^n1 Reservation Thread  VBCurtis  Riesel Prime Search  679  20211009 17:33 
Octoproth Reservation Thread  Greenbank  Octoproth Search  2  20071226 09:58 
Dodecaproth Reservation Thread  Greenbank  Octoproth Search  30  20060209 00:33 