A142218 Primes congruent to 21 mod 41.
103, 349, 431, 677, 1087, 1579, 1907, 2153, 2399, 3137, 3301, 3547, 3793, 5023, 5351, 5843, 6007, 6089, 6581, 6827, 6991, 7237, 8221, 8467, 8713, 9041, 9533, 9697, 10271, 11173, 12157, 12239, 13469, 13633, 13879, 14207, 14699, 15601, 15683, 16339, 16421
Offset: 1
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Programs
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Magma
[p: p in PrimesUpTo(17000) | p mod 41 eq 21 ]; // Vincenzo Librandi, Aug 23 2012
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Mathematica
Select[Range[21,30000,41],PrimeQ] (* Vladimir Joseph Stephan Orlovsky, Jun 03 2011 *) Select[Prime[Range[5000]],MemberQ[{21},Mod[#,41]]&] (* Vincenzo Librandi, Aug 23 2012 *)
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PARI
is(n)=isprime(n) && n%41==21 \\ Charles R Greathouse IV, Jul 03 2016
Formula
a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 03 2016