A050525 - OEIS

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A050525

Primes of the form 11*2^k - 1.

1

43, 738197503, 12384898975268863, 198158383604301823, 935776509032580774524280170437362581503, 239558786312340678278215723631964820865023, 1243860333603982568026641440523014635142548663400435746517610765710004322303

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime.

FORMULA

a(n) = A086225(A001772(n)). - Elmo R. Oliveira, May 04 2025

MATHEMATICA

Select[11 2^Range[0, 250]-1, PrimeQ] (* Harvey P. Dale, Mar 30 2011 *)

CROSSREFS

See A001772 for more terms.

Sequence in context: A177417 A116139 A087529 * A138086 A023933 A271141

Adjacent sequences: A050522 A050523 A050524 * A050526 A050527 A050528

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane, Dec 29 1999

STATUS

approved