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Primes congruent to 7 mod 47.
1

%I #9 Sep 08 2022 08:45:36

%S 7,101,383,571,853,947,1229,1511,1699,2357,3109,3203,3391,3673,3767,

%T 4049,4519,4801,5647,5741,6211,6869,7057,7151,7433,7621,8467,9689,

%U 10159,10253,10723,11287,12227,12697,12791,12979,14107,14389,15329,16363,16927,17021

%N Primes congruent to 7 mod 47.

%H Vincenzo Librandi, <a href="/A142358/b142358.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 46n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2500]],MemberQ[{7},Mod[#,47]]&] (* _Vincenzo Librandi_, Aug 26 2012 *)

%o (Magma) [p: p in PrimesUpTo(18000) | p mod 47 eq 7]; // _Vincenzo Librandi_, Aug 26 2012

%o (PARI) is(n)=isprime(n) && n%47==7 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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