login
A093166
Primes of the form 80*R_k + 3, where R_k is the repunit (A002275) of length k.
3
3, 83, 883, 88883, 88888883, 888888883, 888888888888883, 888888888888888888888888888888888888888888888888883, 88888888888888888888888888888888888888888888888888888888888888888888883
OFFSET
1,1
COMMENTS
Primes of the form (8*10^k - 53)/9. - Vincenzo Librandi, Nov 16 2010
MATHEMATICA
Select[Table[FromDigits[PadLeft[{3}, n, 8]], {n, 80}], PrimeQ] (* Harvey P. Dale, Sep 21 2013 *)
CROSSREFS
Cf. A002275, A056694 (corresponding k), A099422.
Sequence in context: A036943 A178001 A173811 * A111648 A013518 A166241
KEYWORD
nonn
AUTHOR
Rick L. Shepherd, Mar 26 2004
STATUS
approved