login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A273521 Numbers n such that 10*14^n-1 is prime. 0
1, 105, 209, 505, 683, 879, 1233, 11647 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..7.

J. Brillhart, D. H. Lehmer and J. L. Selfridge, New primality criteria and factorizations of 2^m+-1, Math. Compl. 29 (1975) 620-647.

John Eisenmann, Prime Numbers of the Form a * 14^b - 1.

Victor Shoup, A Computational Introduction to Number Theory and Algebra, 2008, page 348.

Eric Weisstein's World of Mathematics, Lucas Sequence.

Eric Weisstein's World of Mathematics, Rabin-Miller Strong Pseudoprime Test.

PROG

(PARI) is(n)=ispseudoprime(10*14^n-1) \\ Charles R Greathouse IV, Jun 08 2016

CROSSREFS

Sequence in context: A044337 A044718 A239827 * A214082 A069692 A212665

Adjacent sequences:  A273518 A273519 A273520 * A273522 A273523 A273524

KEYWORD

nonn,more

AUTHOR

Jack P. Eisenmann, May 23 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 28 21:04 EDT 2022. Contains 354907 sequences. (Running on oeis4.)