The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A004062

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Numbers k such that (6^k - 1)/5 is prime.
(history; published version)

#64 by Alois P. Heinz at Mon Oct 30 15:23:26 EDT 2023

STATUS

proposed

#63 by Ryan Propper at Mon Oct 30 15:12:09 EDT 2023

STATUS

editing

#62 by Ryan Propper at Mon Oct 30 15:12:05 EDT 2023

DATA

2, 3, 7, 29, 71, 127, 271, 509, 1049, 6389, 6883, 10613, 19889, 79987, 608099, 1365019

EXTENSIONS

STATUS

approved

#61 by Michael De Vlieger at Mon Oct 16 16:11:35 EDT 2023

STATUS

proposed

#60 by Sean A. Irvine at Mon Oct 16 15:11:56 EDT 2023

STATUS

editing

#59 by Sean A. Irvine at Mon Oct 16 15:11:51 EDT 2023

NAME

Numbers n such that (6^n - 1)/5 is prime.

COMMENTS

STATUS

approved

#58 by Joerg Arndt at Thu Jan 09 03:33:33 EST 2020

STATUS

reviewed

#57 by Michel Marcus at Mon Jan 06 01:43:41 EST 2020

STATUS

proposed

#56 by Michel Marcus at Thu Jan 02 10:42:43 EST 2020

STATUS

editing

#55 by Michel Marcus at Thu Jan 02 10:42:19 EST 2020

EXTENSIONS

a(14) = 79987, discovered Nov 05 2007, is a probable prime based on trial factoring to 10^11 and Fermat primality test base 2. - Paul Bourdelais

a(15) = 608099 is a probable prime discovered by Paul Bourdelais, May 24 2010

a(16) = 1062191 corresponds to a probable prime discovered by Paul Bourdelais, Dec 31 2019

STATUS

proposed