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A142027 Primes congruent to 23 mod 31. 4
23, 271, 457, 643, 829, 953, 1201, 1511, 1697, 1759, 2069, 2131, 2441, 2503, 2689, 2999, 3061, 3371, 3433, 3557, 3929, 4177, 4363, 4549, 4673, 5107, 5231, 5417, 5479, 5851, 6037, 6719, 6781, 6967, 7649, 8269, 8641, 8951, 9013, 9137, 9199, 9323, 10067, 10253 (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) ~ 30n log n. - Charles R Greathouse IV, Jul 02 2016

MATHEMATICA

Select[Range[23, 20000, 31], PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Apr 30 2011 *)

PROG

(MAGMA) [p: p in PrimesUpTo(12000) | p mod 31 eq 23 ]; // Vincenzo Librandi, Aug 17 2012

(PARI) is(n)=isprime(n) && n%31==23 \\ Charles R Greathouse IV, Jul 02 2016

CROSSREFS

Cf. A000040, A142005, A142006, A142023.

Sequence in context: A240876 A142220 A257930 * A161523 A161930 A162365

Adjacent sequences:  A142024 A142025 A142026 * A142028 A142029 A142030

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jul 11 2008

STATUS

approved

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Last modified May 17 22:15 EDT 2021. Contains 343992 sequences. (Running on oeis4.)