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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 18 11:56 EDT 2018. Contains 316321 sequences. (Running on oeis4.)