Uncommon
Rayo's number
Claimed as largest named number
Rayo's number
Rayo's number is a large number named after Mexican philosophy professor Agustín Rayo, who defined it during a "Big Number Duel" at the Massachusetts Institute of Technology (MIT) on 26 January 2007. At the time, it was claimed to be the largest named number, as its size vastly exceeds even other notable large numbers such as Graham's number and TREE(3).
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