4294967296 is incorrect 2^2^2^2^2^2 does not mean ((((2^2)^2)^2)^2)^2. It means 2^(2^(2^(2^(2^2)))). Reply
2^2^2^2^2^2 does not mean ((((2^2)^2)^2)^2)^2. It means 2^(2^(2^(2^(2^2)))).