3

This number is a prime.

Single Curio View: (Seek other curios for this number)

A mark on a small circle, rolling inside one with three times the diameter, traces out a 3-cusped hypocycloid. Euler called it a deltoid because of its resemblance to the Greek letter delta.

Submitted: 1999-09-02 23:40:00; Last Modified: 2008-05-16 15:52:20.