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A195745
Primes of the form 15*2^k + 1.
4
31, 61, 241, 7681, 15361, 61441, 2013265921, 2061584302081, 4123168604161, 263882790666241, 4222124650659841, 4533471823554859405148161, 77884452878022414427957444938301441, 5612166287350667205902149757630526795478780965027841
OFFSET
1,1
CROSSREFS
Primes in A195744.
Sequence in context: A139892 A088464 A088463 * A078855 A053430 A040930
KEYWORD
nonn
AUTHOR
Brad Clardy, Sep 23 2011
EXTENSIONS
Offset corrected and name changed by Arkadiusz Wesolowski, Sep 23 2011
STATUS
approved