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A142454 Primes congruent to 47 mod 49. 1

%I

%S 47,439,733,929,1223,1321,1811,2203,2399,2693,2791,3673,3967,4261,

%T 4457,4751,5437,5927,6221,6907,7103,7691,7789,8377,8573,8867,9161,

%U 9749,10141,10337,10631,10729,11317,11807,12101,12689,12983,13669,13963,14159,14551

%N Primes congruent to 47 mod 49.

%H Vincenzo Librandi, <a href="/A142454/b142454.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 42n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[2500]], MemberQ[{47}, Mod[#, 49]] &] (* _Vincenzo Librandi_, Aug 28 2012 *)

%o (MAGMA) [p: p in PrimesUpTo(17000) | p mod 49 eq 47]; // _Vincenzo Librandi_, Aug 28 2012

%o (PARI) is(n)=isprime(n) && n%49==47 \\ _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 May 26 13:59 EDT 2022. Contains 354092 sequences. (Running on oeis4.)