The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A125559 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A125559

Numbers n such that 2n^3 + 7 is prime. For n>=8, bases in which 2007 is prime.
(history; published version)

#5 by Charles R Greathouse IV at Tue Jun 13 12:47:19 EDT 2017

STATUS

editing

approved

#4 by Charles R Greathouse IV at Tue Jun 13 12:47:13 EDT 2017

NAME

Numbers n such that 2 n2n^3 + 7 is prime. For n>=8, bases in which 2007 is prime.

PROG

(PARI) is(n)=isprime(2*n^3+7) \\ Charles R Greathouse IV, Jun 13 2017

KEYWORD

base,nonn,easy

STATUS

approved

editing

#3 by Russ Cox at Sat Mar 31 14:40:13 EDT 2012

AUTHOR

_Zak Seidov (zakseidov(AT)gmail.com), _, Jan 01 2007

Discussion

Sat Mar 31

14:40

OEIS Server: https://oeis.org/edit/global/940

#2 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

OFFSET

0,1,2

KEYWORD

base,nonn,new

#1 by N. J. A. Sloane at Fri Jan 12 03:00:00 EST 2007

NAME

Numbers n such that 2 n^3 + 7 is prime. For n>=8, bases in which 2007 is prime.

DATA

0, 2, 3, 5, 6, 8, 12, 17, 20, 26, 27, 32, 33, 36, 38, 41, 47, 50, 60, 65, 72, 75, 78, 87, 101, 111, 122, 123, 135, 137, 146, 152, 156, 162, 165, 173, 177, 188, 191, 195, 197, 221, 243, 246, 261, 267, 272, 291, 303, 311, 312, 321, 323, 330, 332, 333, 338, 362, 365

OFFSET

0,2

KEYWORD

base,nonn,new

AUTHOR

Zak Seidov (zakseidov(AT)gmail.com), Jan 01 2007

STATUS

approved