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A177132 Primes of the form 6*10^n+1. 0
7, 61, 601, 600000001, 6000000001, 6000000000000001, 600000000000000000001, 600000000000000000000000001, 600000000000000000000000000000000000001, 6000000000000000000000000000000000000000000001, 600000000000000000000000000000000000000000000000000000000000000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..11.

Makoto Kamada, Prime numbers of the form 600...001.

MATHEMATICA

Select[Table[6*10^n+1, {n, 0, 70}], PrimeQ] (* Harvey P. Dale, Feb 22 2015 *)

PROG

(MAGMA) [a: n in [0..250]|IsPrime(a) where a is 6*10^n+1]

CROSSREFS

Cf. A056805.

Sequence in context: A269731 A199686 A113718 * A077642 A071172 A259335

Adjacent sequences:  A177129 A177130 A177131 * A177133 A177134 A177135

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Dec 10 2010

STATUS

approved

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Last modified November 17 16:08 EST 2019. Contains 329241 sequences. (Running on oeis4.)