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Revision History for A138250

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Showing entries 1-10 | older changes

A138250

Prime numbers k such that 30*k - 1, 30*k + 1 are twin primes.
(history; published version)

#15 by Charles R Greathouse IV at Thu Sep 08 08:45:33 EDT 2022

PROG

(MAGMAMagma) [n: n in [0..10000] |IsPrime(n) and IsPrime(30*n-1)and IsPrime(30*n+1)] // Vincenzo Librandi, Aug 03 2010

Discussion

Thu Sep 08

08:45

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

#14 by Bruno Berselli at Thu Dec 19 05:48:05 EST 2019

STATUS

reviewed

approved

#13 by Michel Marcus at Thu Dec 19 03:47:27 EST 2019

STATUS

proposed

reviewed

#12 by Amiram Eldar at Thu Dec 19 03:35:15 EST 2019

STATUS

editing

proposed

#11 by Amiram Eldar at Thu Dec 19 03:33:05 EST 2019

CROSSREFS

Cf. A001097, A001359, A006512.

#10 by Amiram Eldar at Thu Dec 19 03:32:41 EST 2019

LINKS

Amiram Eldar, <a href="/A138250/b138250.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing

#9 by Joerg Arndt at Thu Jan 25 02:48:33 EST 2018

STATUS

proposed

approved

#8 by Jon E. Schoenfield at Thu Jan 25 01:28:09 EST 2018

STATUS

editing

proposed

#7 by Jon E. Schoenfield at Thu Jan 25 01:28:07 EST 2018

NAME

Prime numbers n k such that 30*n k - 1, 30*n k + 1 are twin primes.

EXAMPLE

2*30 - 1 = 59 (prime, ), 2*30 + 1 = 61 (prime).

PROG

(MAGMA) [n: n in [0..10000] |IsPrime(n) and IsPrime(30*n-1)and IsPrime(30*n+1)] [From _// _Vincenzo Librandi_, Aug 03 2010]

STATUS

approved

editing

#6 by Russ Cox at Sat Mar 31 12:38:14 EDT 2012

AUTHOR

_Vladimir Joseph Stephan Orlovsky (4vladimir(AT)gmail.com), _, May 05 2008

Discussion

Sat Mar 31

12:38

OEIS Server: https://oeis.org/edit/global/876