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A142356
Primes congruent to 4 mod 47.
1
239, 521, 709, 991, 1367, 1931, 2213, 2683, 2777, 3529, 3623, 4093, 4657, 4751, 5503, 5879, 6067, 7477, 7759, 7853, 8699, 8887, 9733, 10391, 10861, 11519, 11801, 12553, 12647, 13399, 13681, 13963, 14057, 14621, 15091, 15373, 15467, 15749, 15937, 17159
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 46n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Prime[Range[2500]], MemberQ[{4}, Mod[#, 47]]&] (* Vincenzo Librandi, Aug 26 2012 *)
Select[Range[4, 18000, 47], PrimeQ] (* Harvey P. Dale, Apr 02 2023 *)
PROG
(Magma) [p: p in PrimesUpTo(18000) | p mod 47 eq 4]; // Vincenzo Librandi, Aug 26 2012
(PARI) is(n)=isprime(n) && n%47==4 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
Cf. A000040.
Sequence in context: A056086 A046012 A152952 * A142557 A164290 A201787
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved