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A077499 Primes of the form 2^r*11^s + 1. 4

%I

%S 2,3,5,17,23,89,257,353,1409,2663,30977,65537,170369,495617,5767169,

%T 23068673,59969537,82458113,453519617,3429742097,4715895383,

%U 15352201217,39909726209,1857616347137,45732811767809,96757023244289

%N Primes of the form 2^r*11^s + 1.

%C Primes p such that p-1 has at most one odd prime divisor 11.

%Y Cf. A005109, A077497, A077498, A077500.

%K nonn

%O 1,1

%A _Amarnath Murthy_, Nov 07 2002

%E More terms from _Ray Chandler_, Aug 02 2003

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Last modified January 24 21:35 EST 2022. Contains 350565 sequences. (Running on oeis4.)