It is 3 because it has only two factors which are itself and one
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all of these are except 4. 4 is not a prime number!
3*3*4
3 is a prime number. 4 and 10 are both composite numbers having 2 as a factor.
The prime numbers between 4 and 15 are 5, 7, 11, and 13. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In this case, 5, 7, 11, and 13 meet this criteria and are thus prime numbers within the specified range.
a prime number has no factors other than one and itself 4:1,2,4 10:1,2,5,10 3:1,3 3 is the prime number!!!! it's only factors are one and itself!!!!