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A050862 Numbers n such that 221*2^n-1 is prime. +0
1
2, 6, 42, 354, 402, 914, 1562, 10382, 34986, 81042, 104846 (list; graph; listen)
OFFSET

1,1

LINKS

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: A127071 A074015 A074021 this_sequence A115974 A066864 A116896

Adjacent sequences: A050859 A050860 A050861 this_sequence A050863 A050864 A050865

KEYWORD

hard,nonn

AUTHOR

njas, Dec 29 1999

EXTENSIONS

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

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Last modified September 7 15:23 EDT 2008. Contains 143483 sequences.


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