20181217, 02:13  #1 
May 2010
Prime hunting commission.
2^{4}×3×5×7 Posts 
base 42 project
cataloguing primes k*42^{n}+1 for k = 1 ~ 15000, n = 1 ~ until i get bored. gotta catch 'em all, as they say.
current progress: n ~ 700 if someone's already done this, pls let me know. attachments are n = 300 ~ 700 (1 ~ 300 too large to include) 
20181217, 04:13  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
9,431 Posts 
How does it feel to be born yesterday?
These are all searched up to n=200,000 up to k<13372. http://www.noprimeleftbehind.net/cru...onjectures.htm and scroll down to 42. P.S. Good luck with k=13372. Also "fun" to search are k=1, 42 etc... unless you know how. 
20181217, 05:43  #3 
May 2010
Prime hunting commission.
2^{4}·3·5·7 Posts 
i didn't realize that this had been so extensively worked on. many thanks!
Last fiddled with by 3.14159 on 20181217 at 05:49 
20181217, 13:11  #4  
Mar 2006
Germany
B49_{16} Posts 
Quote:
CRUS is only searching for the least n for any k<13372 where k*42^n+1 is prime. Only the remaining 18 kvalues where searched up to n=200k. 

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