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A142607 Primes congruent to 8 mod 55. 1

%I #11 Jul 10 2023 18:29:48

%S 173,283,503,613,1163,1493,1823,1933,2153,2593,3253,3583,3803,4133,

%T 4243,4463,4793,4903,5233,5563,5783,6113,6553,6883,7103,7213,7433,

%U 7873,8093,8423,8753,8863,9413,9743,10513,10733,11173,11393,11503,11833,12163,12713

%N Primes congruent to 8 mod 55.

%H Vincenzo Librandi, <a href="/A142607/b142607.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 40n log n. - _Charles R Greathouse IV_, Jul 04 2016

%t Select[Prime[Range[2500]], MemberQ[{8}, Mod[#, 55]] &] (* _Vincenzo Librandi_, Aug 31 2012 *)

%t Select[Range[8,13000,55],PrimeQ] (* _Harvey P. Dale_, Jul 10 2023 *)

%o (Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 8]; // _Vincenzo Librandi_, Aug 31 2012

%o (PARI) is(n)=isprime(n) && n%55==8 \\ _Charles R Greathouse IV_, Jul 04 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 06:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)