

A177135


Primes of the form 2*10^n  3.


0




OFFSET

1,1


COMMENTS

a(8) has 238 digits, a(9) has 873 digits and a(10) has 989 digits.


LINKS

Table of n, a(n) for n=1..7.


MATHEMATICA

Select[Table[FromDigits[Join[{1}, PadLeft[{}, n, 9], {7}]], {n, 0, 1000}], PrimeQ] (* Harvey P. Dale, Oct 30 2011 *)


PROG

(MAGMA) [a: n in [0..250]  IsPrime(a) where a is 2*10^n3];


CROSSREFS

Cf. A102947.
Sequence in context: A018250 A021184 A069361 * A130817 A055432 A154276
Adjacent sequences: A177132 A177133 A177134 * A177136 A177137 A177138


KEYWORD

nonn


AUTHOR

Vincenzo Librandi, Dec 10 2010


STATUS

approved



