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1,2
4553899 is also in the sequence. - Felix Fröhlich, Jul 04 2014
Table of n, a(n) for n=1..34.
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
Kosmaj, Riesel list k<300.
PrimeGrid, Announcement of n=4553899 - Felix Fröhlich, Jul 04 2014
Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is a prime
Sequence in context: A091675 A067233 A007648 * A074217 A062219 A091103
Adjacent sequences: A050583 A050584 A050585 * A050587 A050588 A050589
hard,nonn
N. J. A. Sloane, Dec 29 1999
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
approved