The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A062581 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A062581

Numbers k such that 15^k - 14^k is prime.
(history; published version)

#22 by Joerg Arndt at Sun Jul 04 08:43:07 EDT 2021

STATUS

reviewed

approved

#21 by Joerg Arndt at Sun Jul 04 08:41:44 EDT 2021

STATUS

proposed

reviewed

#20 by Michel Marcus at Sun Jul 04 08:33:39 EDT 2021

STATUS

editing

proposed

#19 by Michel Marcus at Sun Jul 04 08:33:35 EDT 2021

LINKS

Henri Lifchitz and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=15%5Ep-14%5Ep&action=Search">Top probable primes of the form 15^p-14^p</a>

EXTENSIONS

165559 a(7) from Jean-Louis Charton, Mar 28 2011

STATUS

proposed

editing

#18 by Jon E. Schoenfield at Sun Jul 04 08:26:01 EDT 2021

STATUS

editing

proposed

#17 by Jon E. Schoenfield at Sun Jul 04 08:25:59 EDT 2021

EXTENSIONS

165559 from Jean-Louis Charton in March , Mar 28 2011

#16 by Jon E. Schoenfield at Sun Jul 04 08:25:21 EDT 2021

NAME

Numbers n k such that 15^n k - 14^n k is prime.

COMMENTS

Terms greater than 1000 may correspond to (unproven) strong pseudoprimes 15^n - 14^n. [Clarified by M. F. Hasler, Sep 16 2013]

EXTENSIONS

New term 165559 found by Jean-Louis Charton in March 2011 corresponding to a probable prime with 194713 digits.

165559 from Jean-Louis Charton in March 2011

STATUS

approved

editing

#15 by Charles R Greathouse IV at Mon Jun 12 19:02:55 EDT 2017

STATUS

editing

approved

#14 by Charles R Greathouse IV at Mon Jun 12 19:02:20 EDT 2017

PROG

(PARI) is(n)=ispseudoprime(15^n-14^n) \\ Charles R Greathouse IV, Jun 12 2017

STATUS

approved

editing

#13 by N. J. A. Sloane at Sat Oct 17 08:33:50 EDT 2015

COMMENTS

Terms greater than 1000 may correspond to (unproven) strong pseudo-primes pseudoprimes 15^n - 14^n. [Clarified by M. F. Hasler, Sep 16 2013]

Discussion

Sat Oct 17

08:33

OEIS Server: https://oeis.org/edit/global/2469