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Primes of the form 7^n+2^n.
1

%I #5 Sep 08 2022 08:45:53

%S 2,53,2417

%N Primes of the form 7^n+2^n.

%o (Magma) [ a: n in [0..2100] | IsPrime(a) where a is 7^n+2^n ]

%K nonn,bref

%O 1,1

%A _Vincenzo Librandi_, Apr 29 2010