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Old 2020-02-17, 16:28   #1
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
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