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A person unfamiliar with prime numbers could mistake 51, 91, or any other composite number for a Prime number if the person did not factor the number to make sure it had no other factors then 1 and itself.

Q: Why would 51 and 91 be mistaken for prime numbers?

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31 is prime, but 51 is not as 51=3*17.

No two prime numbers satisfy that request.

The prime numbers in the range 51 - 70 are 53, 59, 61 and 67.

The prime factors of 51 are 3 and 17.

Neither 50 nor 51 are prime numbers.

Related questions

31 is prime, but 51 is not as 51=3*17.

No two prime numbers satisfy that request.

There are ten prime numbers between 51-100.

The prime numbers between 51 and 60 are 53 and 59.

The prime factors of 51 are 3 and 17.

The prime numbers in the range 51 - 70 are 53, 59, 61 and 67.

3 x 17 = 51

No.

Neither 50 nor 51 are prime numbers.

Prime Factorizaton of 51The prime factorization of 51 is:3 X 17Both numbers are prime, so 3 X 17 is the prime factorization of 51.

The prime factors of 51 are 3 and 17.

51 is composite. 51 = 3 x 17. The other three numbers are prime numbers.