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A037177 Numbers n such that 2047*2^n+1 is prime. 0
6, 14, 18, 48, 60, 80, 296, 354, 428, 738, 2118, 2856, 2960, 6992, 25610, 26520, 27354, 36804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..18.

E. L. Blanton, Jr., S. P. Hurd and J. S. McCranie, On a digraph defined by squaring modulo n, Fibonacci Quart. 30 (Nov. 1992), 322-333.

PROG

(PARI) is(n)=ispseudoprime(2047*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A032500 A053474 A072204 * A255217 A048747 A175678

Adjacent sequences:  A037174 A037175 A037176 * A037178 A037179 A037180

KEYWORD

nonn,hard

AUTHOR

Jud McCranie

EXTENSIONS

The term 738 was omitted from the reference. 4 more terms Jun 15 1998.

STATUS

approved

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Last modified April 3 01:23 EDT 2020. Contains 333195 sequences. (Running on oeis4.)