"Sexy primes" are prime numbers that differ by six

[anon73430903]

@MikeR

Nowadays, one is not considered to be a prime number since primes are defined as only being divisible by one and themselves.

While I agree with 1 not being a prime, that definition always bothered me because 1 also can only be divided by 1 and itself. It doesn’t specify that they have to be two different numbers.