User blog:Primussupremus/Mind stagerringly big number.

This number is defined as 50→50→50→50→50...→50→50→50→50→50 where the number of arrows in the chain is 50→50→50→50→50. I would like to know how big this number is compared to for example grahams number I am choosing grahams number as it is a common number people speak about. I would also like to know what class of googolism this number would be.