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A110674 Numbers n such that the string 1111n is prime. +0
1
3, 7, 9, 19, 21, 27, 43, 49, 87, 91 (list; graph; listen)
OFFSET

1,1
EXAMPLE

If n=91 then 1111n = 111191 (prime).

CROSSREFS

Sequence in context: A036976 A031273 A140118 this_sequence A003528 A032913 A154508

Adjacent sequences: A110671 A110672 A110673 this_sequence A110675 A110676 A110677

KEYWORD

nonn

AUTHOR

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

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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