

A103025


Numbers n such that 6*10^n7 is prime.


2



1, 2, 5, 6, 7, 11, 17, 29, 42, 47, 96, 108, 166, 210, 331, 1022, 3593, 4426, 5704, 13936, 16486, 85910
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OFFSET

1,2


COMMENTS

Also numbers n such that 5*10^n + 9*R_n  6 is prime, where R_n = 11...1 is the repunit (A002275) of length n.


LINKS



FORMULA



MATHEMATICA

Do[ If[ PrimeQ[6*10^n  7], Print[n]], {n, 0, 10000}]


PROG



CROSSREFS



KEYWORD

more,nonn


AUTHOR



EXTENSIONS

Addition of a(20)a(22) from Kamada data by Robert Price, Dec 09 2010


STATUS

approved



