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What is the biggest number ever?

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Googolplexian: The worlds largest number with a name. A "1" followed by a googolplex of zeros.

Googolplex: The second largest number with a name. A "1" followed by a googol of zeros.

Googol: A large number. A "1" followed by one hundred zeros.
Googol: 10,000,000,000,000,000,000,000,000,000,000,000,
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Which is the biggest number?

Grahams Number is the largest consevable number, sooo big we don't know what it is.. Apart from we know it ends in 8..... either that or a Googleplex Tree(3) is far bigger

Is the biggest number ever 9?

  Well I guess that depends on how you think of it, I think of it as....   the number line goes 12345678 and 9 then it goes 10 but then in the 20's it only goes to 29 n