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Pedantic correction: "You certainly all know what a prime number is: it is a natural number bigger than 1 which is divisible by no other natural number except
by lIl-IIIl 2y ago
Pedantic correction:
"You certainly all know what a prime number is: it is a natural number bigger than 1 which is divisible by no other natural number except for 1."
By that definition, the set of prime numbers is an empty set. (All natural numbers greater than 1 are divisible by at least two other numbers: 1 and itself).
- thrance 2y agoI think the definition is correct, they say "divisible by no other natural number". Which implies we don't count the number itself as a divisor.
- deleted 2y ago[deleted]