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Primes congruent to 9 mod 47.
1

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

%S 103,197,479,761,1231,1607,1889,3299,3581,3769,3863,4051,5179,5273,

%T 5743,6871,7247,7529,7717,8093,8563,9127,9221,9973,10067,10631,11383,

%U 12041,12323,12511,13451,13921,14767,15331,16553,16741,17117,17681,18433,19373,19843

%N Primes congruent to 9 mod 47.

%H Vincenzo Librandi, <a href="/A142360/b142360.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[{9},Mod[#,47]]&] (* _Vincenzo Librandi_, Aug 26 2012 *)

%o (Magma) [p: p in PrimesUpTo(20000) | p mod 47 eq 9]; // _Vincenzo Librandi_, Aug 26 2012

%o (PARI) is(n)=isprime(n) && n%47==9 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

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