View Single Post
Old 2020-02-17, 16:28   #1
enzocreti
 
Mar 2018

2·263 Posts
Default primes of the form (123+4^(9*10^n))/163

Are there infinitely many prime of the form


(123+4^(9*10^n))/163/31? with n some integer












(4^90000+123)/163/31 is prime?

Or are there other factors?

Last fiddled with by enzocreti on 2020-02-17 at 17:45
enzocreti is offline   Reply With Quote