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A142174 Primes congruent to 25 mod 39. 1

%I #12 Sep 08 2022 08:45:35

%S 103,181,337,571,727,883,1039,1117,1429,1663,1741,2053,2131,2287,2521,

%T 2677,2833,3067,3301,3457,3613,3691,3769,3847,4003,4159,4549,4783,

%U 4861,5407,5563,5641,5953,6343,6421,6577,6733,6967,7591,7669,8059,8293,8527,8761

%N Primes congruent to 25 mod 39.

%H Harvey P. Dale, <a href="/A142174/b142174.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 24n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Range[25,9000,39],PrimeQ] (* _Harvey P. Dale_, May 11 2012 *)

%t Select[Prime[Range[3000]],MemberQ[{25},Mod[#,39]]&] (* _Vincenzo Librandi_, Aug 20 2012 *)

%o (Magma) [p: p in PrimesUpTo(10000) | p mod 39 eq 25 ]; // _Vincenzo Librandi_, Aug 20 2012

%o (PARI) is(n)=isprime(n) && n%39==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 27 18:09 EDT 2024. Contains 372020 sequences. (Running on oeis4.)