20211118, 12:30  #68  
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
2^{3}×401 Posts 
Quote:
Last fiddled with by sweety439 on 20211118 at 12:30 

20211118, 21:51  #69  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10010111011011_{2} Posts 
Quote:
Hint: reread the complete text of A004023. What, upon reading, becomes suddenly more clear? For those who have ADD,  ok: pay attention to the 6th paragraph in the 'Comments' section. 

20211126, 06:57  #70 
Aug 2020
79*6581e4;3*2539e3
5×97 Posts 
To be honest, I also don't get it. The search limit is 10,800,000 but some numbers in the 68M range have not been checked yet (or at least it's not documented).

20211126, 14:54  #71  
Jun 2012
Boulder, CO
15B_{16} Posts 
Quote:
The first untested candidate is now: (10^109548431)/9 so the search limit is actually about 10.9M. 

20211126, 22:05  #72  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10010111011011_{2} Posts 
Quote:
Better yet  Step 1. you feel that some candidate is untested. Next step: For Pete's sake, test it then! 

20211215, 23:32  #73  
Jun 2015
Vallejo, CA/.
7×151 Posts 
Certification of R49081
Re :R49081
Quote:
Last fiddled with by rudy235 on 20211215 at 23:34 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Generalized Repunit primes  Bob Underwood  Math  12  20201011 20:01 
Some CADONFS Work At Around 175180 Decimal Digits  EdH  CADONFS  127  20201007 01:47 
Integers congruent to last two decimal digits mod 23  enzocreti  enzocreti  1  20200303 18:38 
Twin Primes with 128 Decimal Digits  tuckerkao  Miscellaneous Math  2  20200216 06:23 
records for primes  3.14159  Information & Answers  8  20181209 00:08 