Quote:
Originally Posted by enzocreti
92020 is congruent to 2^(2^2) mod (2^(2^2)+1) where 2^(2^2)+1 is a Fermat prime
Are there infinitely many numbers N congruent to (2^(2^n)) mod (2^(2n)+1) where (2^(2n)+1) is a Fermat prime?

Of course there are.
16 mod 17 = 16
33 mod 17 = 16
50 mod 17 = 16
...
So what.
Last fiddled with by retina on 20200212 at 15:14
