Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

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