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A142371 Primes congruent to 20 mod 47. 1
67, 349, 443, 631, 1289, 1571, 1759, 2417, 2699, 2887, 3169, 3733, 4297, 4391, 4673, 4861, 5237, 5519, 5801, 6271, 6553, 7211, 7681, 7963, 8527, 9091, 9467, 9749, 10313, 10501, 11159, 12569, 12757, 13697, 14449, 14543, 14731, 15013, 15107, 15671, 15859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

FORMULA

a(n) ~ 46n log n. - Charles R Greathouse IV, Jul 03 2016

MATHEMATICA

Select[Prime[Range[2500]], MemberQ[{20}, Mod[#, 47]]&] (* Vincenzo Librandi, Aug 27 2012 *)

Select[Range[20, 16000, 47], PrimeQ] (* Harvey P. Dale, Jun 01 2018 *)

PROG

(MAGMA) [p: p in PrimesUpTo(18000) | p mod 47 eq 20]; // Vincenzo Librandi, Aug 27 2012

(PARI) is(n)=isprime(n) && n%47==20 \\ Charles R Greathouse IV, Jul 03 2016

CROSSREFS

Cf. A000040.

Sequence in context: A013533 A012865 A026911 * A142609 A262344 A323577

Adjacent sequences:  A142368 A142369 A142370 * A142372 A142373 A142374

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified February 25 12:28 EST 2021. Contains 341606 sequences. (Running on oeis4.)