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A050849 Numbers n such that 195*2^n-1 is prime. 0
1, 3, 4, 6, 8, 9, 10, 14, 23, 26, 28, 35, 44, 46, 50, 55, 60, 63, 65, 78, 99, 100, 106, 111, 163, 178, 180, 364, 569, 825, 838, 958, 1292, 1425, 1531, 2020, 2259, 2434, 2492, 2520, 3310, 3624, 4195, 4206, 5103, 5139, 5478, 7198, 7335, 8123, 9903, 12239 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..52.

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.

CROSSREFS

Sequence in context: A062969 A175035 A025063 * A039008 A161579 A047416

Adjacent sequences:  A050846 A050847 A050848 * A050850 A050851 A050852

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 21 10:43 EDT 2013. Contains 225478 sequences.