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A084713 Smallest prime of the form (2n-1)^k + 2, or 0 if no such number exists. 6
3, 5, 7, 0, 11, 13, 0, 17, 19, 0, 23, 952809757913929, 0, 29, 31, 0, 1091, 37, 0, 41, 43, 0, 47 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(3n+1) = 0, a(24) = 47^113 - 2 is a 189-digit number.

LINKS

Table of n, a(n) for n=1..23.

EXAMPLE

a(12) = 952809757913927 = 23^11 + 2.

CROSSREFS

Cf. A084714.

Sequence in context: A223174 A225401 A085090 * A162538 A324990 A084712

Adjacent sequences:  A084710 A084711 A084712 * A084714 A084715 A084716

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jun 10 2003

EXTENSIONS

Edited by Robert G. Wilson v, Jun 11 2003

STATUS

approved

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Last modified June 2 08:16 EDT 2020. Contains 334767 sequences. (Running on oeis4.)