

A186630


Numbers n>0 such that 666*10^n+1 is prime.


1



1, 2, 10, 12, 30, 48, 373, 580, 619, 718, 1592, 2928, 3076, 4741, 9198, 14020
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OFFSET

1,2


COMMENTS

No other terms below 10^5. [Arkadiusz Wesolowski, Dec 23 2011]


LINKS

Table of n, a(n) for n=1..16.
Chris Caldwell, The Prime Glossary, Beastly prime
G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 66601
R. Ondrejka, The Top Ten: a Catalogue of Primal Configurations (May 2001), p. 83


MATHEMATICA

Select[Range[10^3], PrimeQ[666*10^# + 1] &] (* Arkadiusz Wesolowski, Sep 08 2011 *)


CROSSREFS

Cf. A186086.
Sequence in context: A080139 A055701 A176978 * A154391 A035928 A014486
Adjacent sequences: A186627 A186628 A186629 * A186631 A186632 A186633


KEYWORD

more,nonn,base


AUTHOR

Arkadiusz Wesolowski, Feb 24 2011


EXTENSIONS

Added a(16)=14020 (discovered on Dec 09 1999, by Nuutti Kuosa), Arkadiusz Wesolowski, Mar 16 2011.


STATUS

approved



