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no, first Prime number is 2 NASA considers 1 a prime number, since it has no whole number factors except for itself. Check this : http://en.wikipedia.org/wiki/Prime_number 1 is not a prime number Okay, it is 2, but 1 used to be taught as the first prime number, back when Pluto was recognized as the ninth planet. Outdated info again. Sorry.

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16y ago

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Q: Is 1 the first prime number?
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