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A064977 n*10^3-1, n*10^3-3, n*10^3-7 and n*10^3-9 are all prime. 2
248, 302, 1094, 5462, 6716, 7274, 7478, 9542, 10193, 13217, 16199, 18560, 20714, 22205, 28856, 29843, 31949, 34457, 35387, 36767, 36977, 36983, 40958, 41393, 45167, 45347, 47273, 47468, 47567, 57101, 57515, 57773, 62156, 64331, 66704 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[40000], PrimeQ[10^3# - 1] && PrimeQ[10^3# - 3] && PrimeQ[10^3# - 7] && PrimeQ[10^3# - 9] &]

Select[Range[70000], AllTrue[# 10^3-{1, 3, 7, 9}, PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Aug 01 2017 *)

CROSSREFS

Sequence in context: A223546 A187398 A065146 * A068400 A240967 A230856

Adjacent sequences:  A064974 A064975 A064976 * A064978 A064979 A064980

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Oct 30 2001

STATUS

approved

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Last modified July 7 12:47 EDT 2022. Contains 355148 sequences. (Running on oeis4.)