A142805 - OEIS

%I #9 Sep 08 2022 08:45:37

%S 7,251,373,617,739,983,1471,2081,2203,2447,3301,3911,4643,5009,5741,

%T 6229,6473,6961,7937,8059,8669,9157,9767,10133,10499,10987,11353,

%U 11597,11719,12329,12451,13183,14159,14281,14891,15013,16111,16477,16843,17209,18307

%N Primes congruent to 7 mod 61.

%H Vincenzo Librandi, <a href="/A142805/b142805.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[2400]], MemberQ[{7}, Mod[#, 61]] &] (* _Vincenzo Librandi_, Sep 05 2012 *)

%t Select[Range[7,20000,61],PrimeQ] (* _Harvey P. Dale_, Dec 21 2019 *)

%o (Magma) [p: p in PrimesUpTo(19000) | p mod 61 eq 7 ]; // _Vincenzo Librandi_, Sep 05 2012

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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