Two is the only even prime number because other even numbers have at least three or more positive divisors. A number can only be considered prime when it only has two positive divisors: itself and 1.
Continue ReadingEven numbers that are higher than 2 are composite numbers, because they have already themselves, 2 and 1 as definite divisors. There is an infinite number of primes, all of which (except the number 2) are odd numbers. A simple way to determine the primality of a number is through trial division, which is done by dividing the number starting with the divisor 2 and up to the number's square root. If any of the quotients doesn't have a remainder, then the number is not a prime number.
Learn more about NumbersThe number zero is not a prime number. By definition, a prime number dictates that the number must be a whole number greater in value than one and must be divisible by only itself and one.
Full Answer >The number 37 is a prime number. The definition of a prime number is any positive number that can only be divided by the number one or itself. A prime number must also be a whole number larger than the value of one.
Full Answer >The number 111 is not a prime number. For a number to be considered a prime number, it cannot be divided by more than just itself and the number one. The number 111 is divisible by three and 37.
Full Answer >The number two is the only whole number factor of 64 because factors must be prime numbers, and all of the divisors of 64 except for the number one are divisible by two. The number 64 has four one-digit divisors, including one, two, four and eight. It also has three two-digit divisors, including 16, 32 and 64. It is the lowest positive number with seven divisors.
Full Answer >