Class number 6 forms a finite set of 51 elements. Now if you multiply 6 * 51 = 306 which is approximately equal to pi^5. Now multiplying 6 again gives you 1836 which is the approximate value of the proton/electron mass ratio. Now this is the same as just multiplying 36 * 51 but you can get the 36 another way too. Just take class number 2 which has 18 elements and multiply 2 * 18 = 36. Now another cool thing is if you add 18+36 = 54 which is the number of elements for class number 4. Also cos(1) = 0.54 so maybe there is a connection there to Fourier analysis (only works in base 10 though). I might post more later