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I put 13: "13 is a prime number. Like all primes, it is odd and has no factors apart from itself and one." Even if it "successfully" tells 2 is the only even prime number it should not say all prime numbers are odd.

Even though two is even, it's odd in that it's the only even prime: https://en.wikipedia.org/wiki/List_of_prime_numbers#Even_pri...

So all prime numbers are odd, even 2.

"All primes are odd, and 2 is the oddest of them all." - JWS Cassels

My favorite number: http://numbermatics.com/n/142857 It's cyclic :)

Doesn't tell much interesting things about 1729... at least from mathematical history point of view :) .

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