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A141884
Primes congruent to 11 mod 20.
1
11, 31, 71, 131, 151, 191, 211, 251, 271, 311, 331, 431, 491, 571, 631, 691, 751, 811, 911, 971, 991, 1031, 1051, 1091, 1151, 1171, 1231, 1291, 1451, 1471, 1511, 1531, 1571, 1811, 1831, 1871, 1931, 1951, 2011, 2111, 2131, 2251, 2311, 2351, 2371, 2411, 2531, 2551
OFFSET
1,1
LINKS
FORMULA
a(n) ~ 8n log n. - Charles R Greathouse IV, Jul 03 2016
MATHEMATICA
Select[Range[11, 5000, 20], PrimeQ[#]&] (* Vladimir Joseph Stephan Orlovsky, Mar 31 2011*)
Select[Prime[Range[400]], Mod[#, 20]==11&] (* Harvey P. Dale, Aug 10 2021 *)
PROG
(Magma) [p: p in PrimesUpTo(3000) | p mod 20 eq 11 ]; // Vincenzo Librandi, Aug 16 2012
(PARI) is(n)=isprime(n) && n%20==11 \\ Charles R Greathouse IV, Jul 03 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jul 11 2008
STATUS
approved