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A053705 Primes p of form q^k-2 where q is also a prime and k > 0. +0
3
2, 7, 23, 47, 79, 167, 241, 359, 727, 839, 1367, 1847, 2207, 2399, 3719, 5039, 6857, 7919, 10607, 11447, 14639, 16127, 17159, 19319, 19681, 28559, 29789, 29927, 36479, 44519, 49727, 50651, 54287, 57119, 66047, 85847, 97967, 113567, 128879 (list; graph; listen)
OFFSET

1,1

COMMENT

79=3^4-2, 243=3^5-2.

MATHEMATICA

Do[s=2+Prime[n]; If[Equal[Length[FactorInteger[s]], 1]&&!PrimeQ[s], Print[s-2]], {n, 1, 100000}]

CROSSREFS

Cf. A025475.

Sequence in context: A049572 A094786 A028871 this_sequence A049001 A049002 A011757

Adjacent sequences: A053702 A053703 A053704 this_sequence A053706 A053707 A053708

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Feb 14 2000

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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