It's a composite number... 51 divides by 3 & 27.
51 is not a prime nor is it a square number. I regret that I have no idea what "comoste" means.
51 is composite.
It is composite.
composite
51 is a composite number but 61 is a prime number
51 is composite, 103 is prime.
3929 is a prime number and 51 is a composite number
51 is composite.
No, it is composite.
51 is a composite number 3 x 17 = 51
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.