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A142303 Primes congruent to 25 mod 44. 1

%I #11 Sep 08 2022 08:45:36

%S 113,157,421,509,641,773,1213,1301,1433,1609,1697,1741,1873,2137,2269,

%T 2357,2621,2753,2797,3061,3413,3457,3677,3853,4073,4337,4513,4733,

%U 4909,5261,5393,5437,5569,5657,5701,6053,6229,6317,6361,6449,6581,6977,7109,7417

%N Primes congruent to 25 mod 44.

%H Vincenzo Librandi, <a href="/A142303/b142303.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 20n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Prime[Range[25000]],MemberQ[{25},Mod[#,44]]&] (* _Vincenzo Librandi_, Aug 25 2012 *)

%t Select[Range[25,7500,44],PrimeQ] (* _Harvey P. Dale_, Jul 28 2018 *)

%o (Magma) [p: p in PrimesUpTo(8000) | p mod 44 eq 25]; // _Vincenzo Librandi_, Aug 25 2012

%o (PARI) is(n)=isprime(n) && n%44==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 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)