Five Vs. Three
Here's the dirt on how these objects relate to one another:
3 and 5 make the earliest standard twin prime pair (2 and 3, or 2 and 5, are not standard twin prime pairs, since they are not distance 2 from each other).
x=3 is the maximal solution to the equation "5^x is x digits long". That is, 5^3 is 3 digits long, but 5^x is less than x digits long for every x>3.
x=3 is the maximal solution to the equation "5^x is x digits long". That is, 5^3 is 3 digits long, but 5^x is less than x digits long for every x>3.
Metrics
Parity Five: odd. Three: odd.
Parity Five: odd. Three: odd.