OFFSET
1,2
COMMENTS
a(17) > 5*10^5. - Robert Price, Oct 05 2015
For numbers k in this sequence, 2^(k-1)*(2^k+17) has deficiency 18 (see A223608). - M. F. Hasler, Jul 18 2016
All terms are odd. - Elmo R. Oliveira, Nov 19 2023
LINKS
Henri Lifchitz and Renaud Lifchitz (Editors), Search for 2^n+17, PRP Top Records.
MATHEMATICA
Do[ If[ PrimeQ[ 2^n + 17 ], Print[ n ]], {n, 0, 11811} ]
Select[Range[10000], PrimeQ[2^# + 17] &] (* Vincenzo Librandi, Aug 28 2015 *)
PROG
(Magma) [n: n in [0..1000] | IsPrime(2^n+17)]; // Vincenzo Librandi, Aug 28 2015
(PARI) is(n)=isprime(2^n+17) \\ Charles R Greathouse IV, Feb 17 2017
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Sep 16 2000
EXTENSIONS
a(13)-a(16) from Robert Price, Aug 24 2015
Edited by M. F. Hasler, Jul 18 2016
a(17) found by Stefano Morozzi, added by Elmo R. Oliveira, Nov 19 2023
STATUS
approved