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A142602 Primes congruent to 2 mod 55. 1

%I #11 Nov 26 2022 17:58:26

%S 2,167,277,607,827,937,1487,1597,2477,2917,3137,3467,3797,3907,4127,

%T 4457,4567,4787,5227,5557,6217,6547,7207,7537,7757,7867,8087,8527,

%U 8747,9187,10067,10177,10837,11057,11497,11717,11827,12157,12377,12487,13037,13147

%N Primes congruent to 2 mod 55.

%H Vincenzo Librandi, <a href="/A142602/b142602.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[{2}, Mod[#, 55]] &] (* _Vincenzo Librandi_, Aug 30 2012 *)

%t Select[Range[2,14000,55],PrimeQ] (* _Harvey P. Dale_, Nov 26 2022 *)

%o (Magma) [p: p in PrimesUpTo(16000) | p mod 55 eq 2]; // _Vincenzo Librandi_, Aug 30 2012

%o (PARI) is(n)=isprime(n) && n%55==2 \\ _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 August 17 23:27 EDT 2024. Contains 375255 sequences. (Running on oeis4.)