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A050544
Numbers k such that 37*2^k-1 is prime.
1
1, 2553, 4893, 7897, 14353, 32125, 51477, 78973, 341365
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..9.
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(37*2^n-1) \\
Charles R Greathouse IV
, Jun 12 2017
CROSSREFS
Cf.
A050412
,
A050413
.
Sequence in context:
A035876
A072435
A050413
*
A185516
A235085
A252685
Adjacent sequences:
A050541
A050542
A050543
*
A050545
A050546
A050547
KEYWORD
hard
,
nonn
AUTHOR
N. J. A. Sloane
, Dec 29 1999
EXTENSIONS
More terms from
David Broadhurst
, Dec 29 1999
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved
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Last modified April 25 09:20 EDT 2024. Contains 371967 sequences. (Running on oeis4.)