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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
OFFSET
1,1
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 * A364430 A077642 A071172
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Dec 10 2010
STATUS
approved