

A182156


Numbers k such that 2^k61 is prime.


0



6, 7, 11, 15, 17, 21, 23, 25, 31, 35, 57, 67, 85, 165, 213, 217, 331, 351, 695, 721, 815, 825, 1007, 1403, 1725, 1833
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OFFSET

1,1


COMMENTS

For these k, N=2^(k1)*(2^k61) is of abundance A033880(N)=60.
The five smallest numbers of abundance 60 are 96, 126, 4288, 2034688, 535871488. Four out of these five are of the form 2^(k1)*(2^k61).


LINKS

Table of n, a(n) for n=1..26.


PROG

(PARI) for(k=1, 999, ispseudoprime(2^k61)&print1(k", "))


CROSSREFS

Sequence in context: A270431 A315832 A224856 * A166496 A267413 A297254
Adjacent sequences: A182153 A182154 A182155 * A182157 A182158 A182159


KEYWORD

nonn,more


AUTHOR

M. F. Hasler, Apr 14 2012


STATUS

approved



