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A142491 Primes congruent to 25 mod 51. 1

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

%S 127,229,331,433,739,1249,1453,1657,1759,1861,2269,2371,2473,2677,

%T 3187,3391,3697,4003,4513,5023,5227,5431,5737,5839,6043,6247,6451,

%U 6553,6961,7369,7573,7879,8287,8389,9001,9103,9511,9613,9817,10429,10531,10837,10939

%N Primes congruent to 25 mod 51.

%H Vincenzo Librandi, <a href="/A142491/b142491.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[2400]], MemberQ[{25}, Mod[#, 51]] &] (* _Vincenzo Librandi_, Aug 28 2012 *)

%o (Magma) [p: p in PrimesUpTo(13000) | p mod 51 eq 25]; // _Vincenzo Librandi_, Aug 28 2012

%o (PARI) is(n)=isprime(n) && n%51==25 \\ _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 April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)