A Colorful View of Pi

Click here for a colorful view of Pi.  Starting from left to right, top to bottom, each of the first N digits of Pi is represented by a different color according to the legend on the right side of the image.  Does anyone know the value of N?  Also, everyone knows that Pi is irrational, as is the square root of two, but unlike the square root of two, Pi is also transcendental.  For bonus points, what does it mean to be transcendental?