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A142217 Primes congruent to 20 mod 41. 2

%I #15 Sep 08 2022 08:45:36

%S 61,307,389,881,1291,1373,1619,1783,2029,2111,2357,2521,2767,3259,

%T 3833,4079,4243,4817,5227,5309,5801,6047,6211,6703,6949,7523,7687,

%U 7933,8179,8753,8999,9491,9901,10639,11131,11213,12197,12689,12853,13099,13591,14083

%N Primes congruent to 20 mod 41.

%H Vincenzo Librandi, <a href="/A142217/b142217.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 40n log n. - _Charles R Greathouse IV_, Jul 02 2016

%t Select[Range[20,30000,41],PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 03 2011 *)

%t Select[Prime[Range[5000]],MemberQ[{20},Mod[#,41]]&] (* _Vincenzo Librandi_, Aug 23 2012 *)

%o (Magma) [p: p in PrimesUpTo(16000) | p mod 41 eq 20 ]; // _Vincenzo Librandi_, Aug 23 2012

%o (PARI) is(n)=isprime(n) && n%41==20 \\ _Charles R Greathouse IV_, Jul 02 2016

%Y Cf. A000040, A142216.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_, Jul 11 2008

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Last modified March 29 05:28 EDT 2024. Contains 371264 sequences. (Running on oeis4.)