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A045319 Primes congruent to {1, 2, 3, 4} (mod 5). 7

%I #14 Jun 26 2022 23:54:43

%S 2,3,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,

%T 101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,

%U 191,193,197,199,211,223,227

%N Primes congruent to {1, 2, 3, 4} (mod 5).

%H Vincenzo Librandi, <a href="/A045319/b045319.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[200]],MemberQ[{1,2,3, 4},Mod[#,5]]&] (* _Vincenzo Librandi_, Aug 08 2012 *)

%o (Magma) [p: p in PrimesUpTo(400) | p mod 5 in [1, 2, 3, 4]]; // _Vincenzo Librandi_, Aug 08 2012

%o (PARI) a(n)=if(n>2,prime(n),n+1) \\ _Charles R Greathouse IV_, Jun 29 2015

%Y Cf. A000040, A045337.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_

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Last modified April 19 13:40 EDT 2024. Contains 371792 sequences. (Running on oeis4.)