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A085958 Primes p such that 8p +1 and (p-1)/8 are primes. 5
17, 137, 809, 857, 3209, 6569, 7577, 9209, 11897, 16217, 17657, 19289, 21929, 23417, 30809, 35129, 37529, 41849, 46889, 53609, 56009, 66377, 70457, 74729, 76697, 78809, 80537, 88937, 91577, 95177, 96857, 103289, 129497, 141257, 165449, 166169 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

EXAMPLE

137 is a term as (137-1)/8 = 17 and 137*8 +1 = 1097 both are primes.

MATHEMATICA

Prime[ Select[ Range[15208], PrimeQ[ 8Prime[ # ] + 1] && PrimeQ[(Prime[ # ] - 1)/8] & ]]

Select[Prime[Range[16000]], PrimeQ[8#+1]&&PrimeQ[(#-1)/8]&] (* Harvey P. Dale, Jan 23 2013 *)

CROSSREFS

Cf. A085956, A085957.

Sequence in context: A041550 A142788 A244874 * A120784 A271395 A277387

Adjacent sequences:  A085955 A085956 A085957 * A085959 A085960 A085961

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jul 16 2003

EXTENSIONS

Edited and extended by Zak Seidov and Robert G. Wilson v, Jul 18 2003

STATUS

approved

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Last modified November 19 22:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)