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A177440 Primes of the form (8*10^n + 7)/3. 1
5, 29, 269, 26669, 26666669, 266666666666669, 266666666666666666669, 2666666666666666666666666666666666666669 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(12) has 1191 digits. - Vincenzo Librandi, Jan 03 2014
LINKS
MATHEMATICA
Select[Table[(8 10^n + 7)/3, {n, 0, 300}], PrimeQ] (* Vincenzo Librandi, Jan 03 2014 *)
PROG
(Magma) [a: n in [0..250] | IsPrime(a) where a is (8*10^n+7)div(3)]
CROSSREFS
Cf. A102957.
Sequence in context: A326986 A228387 A181356 * A292567 A355376 A332517
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Dec 11 2010
STATUS
approved

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Last modified September 15 07:14 EDT 2024. Contains 375932 sequences. (Running on oeis4.)