User blog comment:DrCeasium/new hyperfactorial array notation/@comment-5150073-20130416230152/@comment-5529393-20130416234924

To be anal, here is what I get for the volume of the observable universe:

r = 13.7 billion light years, but the volume is 4 pi/3 r^3, not pi/4 r^3. This yields 1.08 * 10^31 cubic light years. There are 5.85 * 10^50 planck lengths in a light year, so 2.01 * 10^152 cubic planck lengths in a cubic light year, so the observable universe is 2.16 * 10^183 cubic planck lengths.

There are 5.85 * 10^50 planck times in a year, so the age of the universe is 8.015 * 10^60 planck times old. (2^(2.16 * 10^183))^(8.015 * 10^60) = 2^(1.73 * 10^244) = 10^(5.21 * 10^243).