Assertion: prime number's factor | /r/HasProperty | only
Facets:
Source sentences:
text: For example, the number 5 is prime because its only two factors are 1 and 5.
text: For example, the number 3 is a prime number because its only factors are 1 and 3.
text: Two is a prime number because its only factors are 1 and itself.
text: 2 is a prime number because its only factors are 2 and 1.
text: For example, 7 is a prime number because its only factors are 1 and 7.