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A110680 Numbers n such that the string 4444n is prime. +0
2
9, 21, 43, 49, 61, 63, 69, 73, 87, 109 (list; graph; listen)
OFFSET

1,1
EXAMPLE

If n=109 then 4444n = 4444109 (prime).

CROSSREFS

Sequence in context: A107890 A110209 A053476 this_sequence A163205 A154862 A020137

Adjacent sequences: A110677 A110678 A110679 this_sequence A110681 A110682 A110683

KEYWORD

nonn,base

AUTHOR

Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 14 2005

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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