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A142220 Primes congruent to 23 mod 41. 2
23, 269, 433, 761, 1171, 1499, 1663, 2237, 2647, 2729, 3221, 3467, 3631, 3877, 4451, 4861, 4943, 5107, 5189, 5927, 6091, 6173, 6337, 6829, 6911, 7321, 7649, 8059, 8387, 9043, 9371, 9781, 10273, 10601, 10847, 11093, 11257, 11503, 11831, 12241, 12323, 12487 (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) ~ 40n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Prime[Range[5000]], MemberQ[{23}, Mod[#, 41]]&] (* Vincenzo Librandi, Aug 24 2012 *)

Select[Range[23, 13000, 41], PrimeQ] (* Harvey P. Dale, Aug 21 2016 *)

PROG

(MAGMA) [p: p in PrimesUpTo(17000) | p mod 41 eq 23 ]; // Vincenzo Librandi, Aug 24 2012

(PARI) is(n)=isprime(n) && n%41==23 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040.

Sequence in context: A140620 A002681 A240876 * A257930 A142027 A161523

Adjacent sequences:  A142217 A142218 A142219 * A142221 A142222 A142223

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified May 12 10:54 EDT 2021. Contains 343821 sequences. (Running on oeis4.)