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To be honest, I don't really know the rules governing US phone numbers and just did a cursory google search, which came up with the simple answer of "10 billion
by mckirk 6y ago
To be honest, I don't really know the rules governing US phone numbers and just did a cursory google search, which came up with the simple answer of "10 billion".
That is very likely quite an overestimation. But if I'm not mistaken, the limitations you describe only reduce the search space by 19% (since it's two 90%-steps).
- dotancohen 6y ago100 * 0.1 = 10 // First 90% Reduction 10 * 0.1 = 1 // Second 90% Reduction
- mckirk 6y agoNot allowing a single digit to be 0 is a 10% reduction though, is it not?
- dotancohen 6y agoOh, you're right! Thank you.
- mckirk 6y agoNo worries :) I checked the math so many times because I was starting to suspect my mind was glitching, lol.