100,000,000 = 9 digits, unless you're going to get sassy and say that 'create' can also mean calculate the number through f.ex. multiplication.
Then you'd quickly be down to at least 3 digits, as 10^9 = 100,000,000 = 9 digits.
Whether or not 2 digits would be possible I am not entirely sure, then I guess you'd have to enter the world of symbols and letters (thus loosening the definition of 'digit' as well).
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