User blog comment:Alejandro Magno/Graham Notation Extension/@comment-5029411-20140928192922

Ultimate Graham Number = G2(0)

G2(1) = Ultimate Graham Number, replacing 64 into G2(0)

G2(2) = Ultimate Graham Number, replacing 64 into G2(1)

2G2(0) = G2(64) = Ultimate Graham Power Number

3G2(0) = 2G2(64) = Ultimate Graham Tower Number

G22(0) = 64G2(64) = Ultimate Super Graham Number

G23(0) = 64G22(64) = Ultimate Super Super Graham Number

G3(0) = 64G264(64) = Ultimate Ultimate Graham Number

G4(0) = 64G364(64) = Ultimate Ultimate Ultimate Graham Number

64G6464(64) = Ultra Graham Number