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A comment on The Map of Mathematics [video].

Re:The Map of Mathematics [video] by reinhardt1053 on Thursday February 09, 2017 @07:57AM (#13606562)
Great video, one mistake I spotted: he did include the number 1 among the prime numbers.
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Re:The Map of Mathematics [video] by kol on Thursday February 09, 2017 @08:14AM (#13606648)
Because 1 is not a prime: "A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself." https://www.wikiwand.com/en/Prime_number
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Re:The Map of Mathematics [video] by rtpg on Thursday February 09, 2017 @09:13AM (#13607012)
Funner definition is "positive number with exactly two divisors". This reduces the amount of special casing
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Re:The Map of Mathematics [video] by bbcbasic on Thursday February 09, 2017 @04:21PM (#13611100)
The reason:

"The uniqueness in this theorem requires excluding 1 as a prime because one can include arbitrarily many instances of 1 in any factorization"

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