Whats the smallest prime number?

Question

What is the smallest prime number? Is it 1 or 2?

Answer 1

The prime number is a number that has 2 different factors 1 and itself
so 1 is not prime because it has only one factor
let's take it this way : what r the factors of the number 1 ?
the answer will be 1 and 1 that is 1 only
so 1 doesn't apply the definition of the prime number.
2 is the smallest prime number

Answer 2

2

Answer 3

2

Answer 4

2

Answer 5

2

Answer 6

Until the 19th century, most mathematicians considered the number 1 a prime, and there is still a large body of mathematical work that is valid despite labeling 1 a prime, such as the work of Stern and Zeisel. Henri Lebesgue is said to be the last professional mathematician to call 1 prime. The change in label occurred so that it can be said that “each number has a unique factorization into primes”

If 1 is prime then every other number could have any number of 1's as factors making it not unique. Since every single number can be divided by 1 nothing would be prime.
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Answer 7

2 is the smallest one, and the only even one. 1 isn't prime, because prime means only divisible by 1 and itself(2 numbers).

Answer 8

That's 2. 1 is a unit, not a prime number.
By definition, a prime number must be greater
than 1.

Answer 9

2 as one is unique... and including it as a prime would cause problems such as making nonsense of the Fundamental Theorem of Arithmetic which states: any positive integer >1 may be expressed uniquely (without respect to order) as a product of primes... if one were a prime we'd have 6=3x2 6=3x2x1 6=3x2x1x1 all prime factorizations of 6.

Just definition, one is neither prime nor composite.

Answer 10

2.