The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A024898 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A024898

Positive integers k such that 6*k - 1 is prime.
(history; published version)

#44 by Michel Marcus at Sun Feb 11 01:05:43 EST 2018

CROSSREFS

Cf. A007528, A046953 (complement).

STATUS

proposed

editing

#43 by Muniru A Asiru at Sat Feb 10 17:23:34 EST 2018

STATUS

editing

proposed

#42 by Muniru A Asiru at Sat Feb 10 17:23:19 EST 2018

COMMENTS

Number of terms less than 10^r, r=1,2,3,...: 0, 8, 56, 397, 3040, 24571, 206502, 1781237, ... - Muniru A Asiru, Jan 26 2018

STATUS

proposed

editing

#41 by Jon E. Schoenfield at Fri Jan 26 21:12:58 EST 2018

STATUS

editing

proposed

#40 by Jon E. Schoenfield at Fri Jan 26 21:12:55 EST 2018

NAME

Positive integers k such that 6k - 1 is prime.

COMMENTS

Numbers N For each number k in this sequence satisfy that , there are no positive integers (x,y) such that Nk = 6xy + x - y. - Pedro Caceres, Jan 22 2018

STATUS

proposed

editing

#39 by Muniru A Asiru at Fri Jan 26 09:09:08 EST 2018

STATUS

editing

proposed

#38 by Muniru A Asiru at Fri Jan 26 09:08:43 EST 2018

COMMENTS

Number of terms less than 10^kr: 0, 8, 56, 397, 3040, 24571, 206502, 1781237, ... - Muniru A Asiru, Jan 26 2018

#37 by Muniru A Asiru at Fri Jan 26 09:06:41 EST 2018

COMMENTS

Number of terms < less than 10^k: 0, 8, 56, 397, 3040, 24571, 206502, 1781237, ... - Muniru A Asiru, Jan 26 2018

MAPLE

select(nk -> isprime(6*k-1), [$1..10^3]); # Muniru A Asiru, Jan 26 2018

#36 by Muniru A Asiru at Fri Jan 26 09:04:48 EST 2018

COMMENTS

Number of terms < 10^k: 0, 8, 56, 397, 3040, 24571, 206502, 1781237, ... - Muniru A Asiru, Jan 26 2018

MAPLE

select(n->isprime(6*k-1), [$1..10^3]); # Muniru A Asiru, Jan 26 2018

PROG

(GAP) Filtered([1..1000], k->IsPrime(6*k-1)); # Muniru A Asiru, Jan 26 2018

STATUS

proposed

editing

#35 by Jon E. Schoenfield at Wed Jan 24 22:40:57 EST 2018

STATUS

editing

proposed