Prime number
WordNet
noun
(1) An integer that has no integral factors but itself and 1
WiktionaryText
Noun
- Any natural number greater than 1 divisible only by itself and 1.
- Every natural number greater than 1 can be factorized into prime numbers.
Usage notes
- Modern mathematical usage specifies that 1 is not a prime number (as has been defined here); some older texts consider 1 to be a prime number.