The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A229947 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A229947

Primes congruent to {1, 11, 13, 17, 19, 29} mod 30.
(history; published version)

#25 by Charles R Greathouse IV at Thu Sep 08 08:46:06 EDT 2022

PROG

(MAGMAMagma) [p: p in PrimesUpTo(500) | p mod 30 in {1, 11, 13, 17, 19, 29} ]; // Vincenzo Librandi, Apr 05 2015

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#24 by Michel Marcus at Sun Apr 05 14:38:46 EDT 2015

STATUS

reviewed

approved

#23 by Wesley Ivan Hurt at Sun Apr 05 14:16:26 EDT 2015

STATUS

proposed

reviewed

#22 by Vincenzo Librandi at Sun Apr 05 14:13:19 EDT 2015

STATUS

editing

proposed

#21 by Vincenzo Librandi at Sun Apr 05 14:13:10 EDT 2015

MATHEMATICA

Select[Prime@Range[100], MemberQ[{1, 11, 13, 17, 19, 29}, Mod[#, 30]] &] (* Vincenzo Librandi, Apr 05 2015 *)

PROG

(MAGMA) [p: p in PrimesUpTo(500) | p mod 30 in {1, 11, 13, 17, 19, 29} ]; // Vincenzo Librandi, Apr 05 2015

STATUS

approved

editing

#20 by Charles R Greathouse IV at Sun Mar 08 15:01:09 EDT 2015

STATUS

editing

approved

#19 by Charles R Greathouse IV at Sun Mar 08 15:01:06 EDT 2015

LINKS

_Omar E. Pol_, , <a href="http://www.polprimos.com/imagenes/cribade30columnas.jpg">Prime numbers in a sieve with 30 columns</a>

FORMULA

a(n) ~ 4/3 n log n. - Charles R Greathouse IV, Mar 08 2015

PROG

(PARI) is(n)=isprime(n) && setsearch([1, 11, 13, 17, 19, 29], n%30) \\ Charles R Greathouse IV, Mar 08 2015

KEYWORD

nonn,easy

STATUS

approved

editing

#18 by T. D. Noe at Tue Nov 05 11:56:16 EST 2013

STATUS

proposed

approved

#17 by Jon E. Schoenfield at Sun Nov 03 20:09:29 EST 2013

STATUS

editing

proposed

#16 by Jon E. Schoenfield at Sun Nov 03 20:09:25 EST 2013

MATHEMATICA

Select[FlatttenFlatten[Table[30n + {1, 11, 13, 17, 19, 29}, {n, 0, 11}]], PrimeQ] (* Alonso del Arte, Nov 01 2013 *)

STATUS

proposed

editing