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A142551
Primes congruent to 21 mod 53.
1
127, 233, 1187, 1399, 1823, 2141, 2459, 2671, 2777, 3307, 3413, 3943, 4049, 4261, 5003, 5639, 5851, 6911, 7229, 7547, 7759, 8501, 8713, 8819, 9137, 9349, 10091, 10303, 10939, 11257, 11681, 12211, 12953, 13907, 14437, 14543, 15073, 15391, 15497, 16451, 16981
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 52n log n. - Charles R Greathouse IV, Jul 04 2016
MATHEMATICA
Select[Prime[Range[2600]], MemberQ[{21}, Mod[#, 53]] &] (* Vincenzo Librandi, Aug 30 2012 *)
Select[Range[21, 17000, 53], PrimeQ] (* Harvey P. Dale, May 11 2022 *)
PROG
(Magma) [p: p in PrimesUpTo(20000) | p mod 53 eq 21]; // Vincenzo Librandi, Aug 30 2012
(PARI) is(n)=isprime(n) && n%53==21 \\ Charles R Greathouse IV, Jul 04 2016
CROSSREFS
Cf. A000040.
Sequence in context: A142466 A268860 A142491 * A048453 A276495 A196657
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved