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A077375
Numbers k such that 2^k + prime(k) is prime.
5
2, 3, 4, 5, 12, 13, 14, 23, 57, 106, 226, 227, 311, 373, 1046, 1298, 1787, 1952, 2130, 2285, 2670, 3254, 3642, 4369, 13559, 33418, 66830
OFFSET
1,1
COMMENTS
All terms < 5000 correspond to certified primes (Primo 2.2.0 beta). - Ryan Propper, Aug 08 2005
66830 was found by Henri Lifchitz.
EXAMPLE
2^12 + prime(12) = 4096 + 43 = 4139 is a prime, so 12 is a term.
CROSSREFS
Sequence in context: A281597 A039007 A050745 * A328209 A250049 A132027
KEYWORD
nonn
AUTHOR
Jason Earls, Nov 30 2002
EXTENSIONS
2 more terms from Ryan Propper, Aug 08 2005
66830 sent by Jason Earls, Jan 12 2008
STATUS
approved