A186630 Numbers n>0 such that 666*10^n+1 is prime.

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

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

nonn,base,more

Author

Arkadiusz Wesolowski, Feb 24 2011

Extensions

a(16) (discovered on Dec 09 1999, by Nuutti Kuosa) added by Arkadiusz Wesolowski, Mar 16 2011

Status

approved