Question

Is there any more than 5 digit prime number which has all the digits same.

Answer 1

if all the digits are the same....then it's divisible by that number, yes?

like 666666 is divisible by 6....

Answer 2

so then...the only number left would be if the digits were 1s....like 11111 although it's divisible by 1, it doesn't matter...

Answer 3

it's divisible though...

Answer 4

\[11...111\]19 times is prime

Answer 5

http://en.wikipedia.org/wiki/Repunit