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A142480 Primes congruent to 7 mod 51. 1

%I

%S 7,109,211,313,619,823,1129,1231,1741,2251,2557,2659,3067,3169,3271,

%T 3373,4597,4801,4903,5107,5209,5413,5821,5923,6229,6637,6841,7351,

%U 7759,7963,8167,8269,8677,8779,9187,9391,9697,9901,10513,11329,11839,11941,12043

%N Primes congruent to 7 mod 51.

%H Vincenzo Librandi, <a href="/A142480/b142480.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 32n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2000]],Mod[#,51]==7&] (* _Harvey P. Dale_, Jan 18 2011 *)

%t Select[Prime[Range[2400]], MemberQ[{7}, Mod[#, 51]] &] (* _Vincenzo Librandi_, Aug 28 2012 *)

%o (MAGMA) [p: p in PrimesUpTo(13000) | p mod 51 eq 7]; // _Vincenzo Librandi_, Aug 28 2012

%o (PARI) is(n)=isprime(n) && n%51==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

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Last modified July 10 14:17 EDT 2020. Contains 335576 sequences. (Running on oeis4.)