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A100914 Numbers n such that (273*2^n+1)^2-2 is prime. 0

%I

%S 6,8,15,19,30,33,50,54,61,85,190,225,270,295,323,456,616,778,1523,

%T 2921,3264,6780,8463,10915,11390,13304,13860,16625,17851,21816

%N Numbers n such that (273*2^n+1)^2-2 is prime.

%C a(31) > 29391. - _J.W.L. (Jan) Eerland_, Dec 20 2021

%H S. Harvey, <a href="http://harvey563.tripod.com/Carol_Kynea.txt">Carol and Kynea Primes</a>.

%t DeleteCases[ParallelTable[If[PrimeQ[(273*2^n+1)^2-2],n,a],{n,0,21816}],a] (* _J.W.L. (Jan) Eerland_, Dec 20 2021 *)

%o (PARI) is(n)=ispseudoprime((273*2^n+1)^2-2) \\ _Charles R Greathouse IV_, Feb 19 2016

%K nonn,more

%O 1,1

%A _Ray Chandler_, Nov 21 2004

%E a(24) - a(30) from _J.W.L. (Jan) Eerland_, Dec 20 2021

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Last modified January 22 20:00 EST 2022. Contains 350504 sequences. (Running on oeis4.)