12 3^^3 is a power tower of 3s. 4^^5 is a power tower of4s and 5s. 3^^^^^3, 4^^^^5 doesn't count to Graham's number. Note: Try it:) Reply
3^^3 is a power tower of 3s.
4^^5 is a power tower of4s and 5s.
3^^^^^3, 4^^^^5 doesn't count to Graham's number.
Note: Try it:)