31 and 61 are prime, the rest composite.
prime
61 is a prime number
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 61 is prime.
61 is a prime number
61 is prime.
51 is a composite number but 61 is a prime number
ANSWER: 61 is a prime number but 51 is a composite number.61 is a prime number because the factors of 61 are 1 and itself (61).51 is a composite number because the factors of 51 other 1 and itself (51) are 3 and 17.
is the number 61 composite? no. it comes to the conclusion that is not composite because it is not divisible with any other number. Thus, 61 is a prime number. it is only divisible by 1 and 61
61 has only two factors, 1 and 61, which means that it is a prime number. There are no other integers that are factors of 61. (A composite number can be divided by numbers besides 1 and itself.)
I think it's prime. But whenever you wanted to know a number is prime or composite, use this site. It must be usefull:prime-calculator dot com
13 prime 63 composite 61 prime 31 prime Well the question should have been either, Which one of these numbers is not a composite number? Or, Which one of these numbers is not a prime number?