A050545 Numbers n such that 39*2^n-1 is a prime.

3, 24, 105, 153, 188, 605, 795, 813, 839, 2135, 2619, 4053, 8333, 15519, 16025, 16505, 30684, 40700, 43683, 52233, 142205, 222345, 225333, 292839, 322613, 747219, 781220

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 a prime

Kosmaj, Riesel list k<300.

Crossrefs

Cf. A002269 = 39*2^n+1 is a prime.

Sequence in context: A320976 A164938 A342112 * A354676 A253944 A139031

Adjacent sequences: A050542 A050543 A050544 * A050546 A050547 A050548

Keyword

hard,nonn

Author

N. J. A. Sloane, Dec 29 1999

Extensions

More terms from Hugo Pfoertner, Aug 29 2004

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008

Status

approved