Probably goes up to 10^^1e308, I'm not sure but it goes up to at least 10^^9e18

^^ is tetration
10^^3 = 10^10^10 = 1e1e10
10^^5 = 10^10^10^10^10 = 1e1e1e1e10 = eeee10 = (e^4)10


Tutorial:
supergte(), supergt(), superlte() and superlt() are >=, >, <=, <
superadd(n, n2) adds n and 2 (wow)
supermul(n, n2) multiplies n and n2
superdiv(n, n2) divides n by n2
superpow(n, n2) raises n to the power of n2
maxabs(n, n2) gives the biggest of the two numbers
fromnumber(n) returns a big number from a number
normalize(n) normalizes a big number
superformat(n) formats a big number
remove everything past 650 if ur not here to test
To use the commands you need to do:
/superadd 1, 342, 1 1, 342.43, 1 (don't add this last part but) = 10^342+10^342.43 = 3.691534803926885e342

don't use a "," for normalize and superformat