Prime 66666667
 

10^9+5 is the only number of the form 10^n+5 divisible by the beast prime 66666667?

[CODE]? znorder( Mod(10,66666667) )
%1 = 11111111[/CODE]
Therefore 66666667 will divide all numbers of the form 10^(9+k*11111111)+5

For example, it will divide 10^11111120+5