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A050896
Numbers n such that 275*2^n-1 is prime.
0
6, 12, 16, 22, 34, 40, 72, 198, 220, 348, 376, 552, 594, 814, 972, 3168, 3702, 3834, 4642, 5116, 9720, 20434, 53692, 123678, 147802, 204516, 398928
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..27.
Ray Ballinger and Wilfrid Keller,
List of primes k.2^n + 1 for k < 300
Wilfrid Keller,
List of primes k.2^n - 1 for k < 300
Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime
Kosmaj,
Riesel list k<300
.
PROG
(PARI) is(n)=ispseudoprime(275*2^n-1) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Sequence in context:
A315657
A315658
A315659
*
A315660
A315661
A315662
Adjacent sequences:
A050893
A050894
A050895
*
A050897
A050898
A050899
KEYWORD
hard
,
nonn
AUTHOR
N. J. A. Sloane
, Dec 29 1999
EXTENSIONS
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved
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Last modified July 16 05:19 EDT 2024. Contains 374343 sequences. (Running on oeis4.)