See the related link on names of large numbers. Depending on which naming system:
In the American System, a Centillion is 10^303 [1 with 303 zeros]
In the European System, Centillion is 10^600 [1 with 600 zeros]
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A centillion is a number consisting of 1 followed by 303 0s. Nobody, in particular, "made" it.
centillion
1 centillion = 10303
According to the link I'm posting, a quadrillion is 1015, and a centillion is 10303, so centillion is bigger.
go with centillion its way higher than quadrillion