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A050906
Numbers n such that 295*2^n-1 is prime.
0
5, 23, 35, 53, 59, 65, 113, 149, 205, 275, 365, 503, 1019, 2105, 2473, 2999, 4813, 8873, 10985, 16495, 32065, 47689, 52727, 63413, 177695, 374035, 389903
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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(295*2^n-1) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Sequence in context:
A231002
A329160
A337436
*
A195974
A098421
A371622
Adjacent sequences:
A050903
A050904
A050905
*
A050907
A050908
A050909
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 May 2 19:04 EDT 2024. Contains 372203 sequences. (Running on oeis4.)