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 A177135 Primes of the form 2*10^n - 3. 0
 17, 197, 1997, 19997, 19999999999997, 199999999999997, 19999999999999999999999999999999999999999999999999999999999999999999999999997 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(8) has 238 digits, a(9) has 873 digits and a(10) has 989 digits. LINKS 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^n-3]; 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

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Last modified December 14 19:27 EST 2019. Contains 329987 sequences. (Running on oeis4.)