login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A142041 Primes congruent to 15 mod 32. 2

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

%S 47,79,239,271,367,431,463,719,751,911,1039,1103,1231,1327,1423,1487,

%T 1583,1871,1999,2063,2287,2351,2383,2447,2543,2671,2767,2927,3023,

%U 3119,3343,3407,3631,3727,3823,3919,4079,4111,4271,4463,4591,4751,4783,4943,5039

%N Primes congruent to 15 mod 32.

%H Vincenzo Librandi, <a href="/A142041/b142041.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) ~ 16n log n. - _Charles R Greathouse IV_, Jul 03 2016

%t Select[Range[15, 20000, 32], PrimeQ] (* _Vladimir Joseph Stephan Orlovsky_, Jun 24 2011 *)

%t Select[Prime[Range[2000]],MemberQ[{15},Mod[#,32]]&] (* _Vincenzo Librandi_, Aug 18 2012 *)

%o (Magma) [p: p in PrimesUpTo(6000) | p mod 32 eq 15 ]; // _Vincenzo Librandi_, Aug 18 2012

%o (PARI) is(n)=isprime(n) && n%32==15 \\ _Charles R Greathouse IV_, Jul 03 2016

%Y Cf. A000040.

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_, Jul 11 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)