Which of the following is the first prime number?

The first prime number is defined as the smallest integer greater than one that has no positive divisors other than 1 and itself. In this context, the number 2 fulfills this definition, as it can only be divided evenly by 1 and 2.

While 1 is not considered a prime number because prime numbers must have exactly two distinct positive divisors, which does not apply to 1. The numbers 3 and 4 do not qualify as the first prime number either; while 3 is a prime number, it is larger than 2, and 4 is not a prime number because it has divisors of 1, 2, and 4. Thus, 2 stands out as the first prime number in the sequence of natural numbers.