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And can everyone stop using '''triple single quotes''' to mark quotations. English isn't Python; they have different syntaxes.

Indeed. Sorry for the error. My point was merely to indicate orders of magnitude and I was using is as short-hand for the word "order", as you might use that term in a Fermi problem.

I agree. O(100s of billions) = O(1).

Even more precisely: If a function belongs to O(100s of billions), it also belongs to O(1).