291 is not prime. It is at least divisible by 3 and 97. This makes it not prime since all prime numbers must only be divisible by 1 and itself.
No 291 is not a prime number
97*3 = 291 so 291 is composite, not prime.
291 has two prime factors: 3 and 97.
The prime factorization of 291 is 3x97.
Prime
291 = 3 x 97
291 = 3 x 97
291 = 3 x 97
1,3,97,291 (1 x 291 = 291 & 3 x 97 = 291)
The digits of 291 add to 12 which is divisible by 3. So 291 is divisible by 3 so it cannot be prime.
The PF of 291 is: 3 x 97
composite 3 X 97 = 291 Save