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Primes of the form 2^n+41
1

%I #10 Sep 08 2022 08:45:53

%S 43,73,2089,8233,131113,33554473,137438953513,140737488355369,

%T 9007199254741033,2658455991569831745807614120560689193

%N Primes of the form 2^n+41

%C Generated by n = 1, 5, 11, 13, 17, 25, 37, 47, 53, 121, 445, 629, 839, 935, 1237, 3359, 3653, 4601,... - R. J. Mathar, Aug 24 2011

%C The next term has 134 digits. [From Harvey P. Dale, Sep 24 2011]

%t Select[2^Range[0,500]+41,PrimeQ] (* _Harvey P. Dale_, Sep 24 2011 *)

%o (Magma) [ a: n in [0..750] | IsPrime(a) where a is 2^n+41 ]

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Apr 29 2010