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A273517
Numbers k such that 2*14^k1 is prime.
1
4, 10, 124, 550, 4720, 14644, 23896, 83384, 95492
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OFFSET
1,1
COMMENTS
a(10) > 10^5. 
Tyler NeSmith
, May 11 2021
LINKS
Table of n, a(n) for n=1..9.
J. Brillhart, D. H. Lehmer and J. L. Selfridge,
New primality criteria and factorizations of 2^m+1
, Math. Compl. 29 (1975) 620647.
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,
RabinMiller Strong Pseudoprime Test
.
MATHEMATICA
Select[Range[0, 15000], PrimeQ[2 14^#  1] &] (*
Vincenzo Librandi
, May 24 2016 *)
PROG
(PARI) is(n)=ispseudoprime(2*14^n1) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Sequence in context:
A203224
A198156
A347818
*
A370687
A003086
A102958
Adjacent sequences:
A273514
A273515
A273516
*
A273518
A273519
A273520
KEYWORD
nonn
,
more
AUTHOR
Jack P. Eisenmann
, May 23 2016
EXTENSIONS
a(7)a(9) from
Tyler NeSmith
, May 11 2021
STATUS
approved
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Last modified June 16 16:46 EDT 2024. Contains 373432 sequences. (Running on oeis4.)