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What is an facts about prime numbers?
Prime numbers are numbers that have only 2 factors, 1 and itself. The number one is not prime or composite. Most prime numbers are odd. There is only one composite even number, 2.
Are even numbers prime numbers?
The only prime number that's even is 2 the rest are odd but that doesn't mean ALL odd numbers are prime. Many are but not most.
How many factors can be used at the most to be a prime number?
Prime numbers only have two factors, one and the number itself.
Is the difference of two prime numbers a prime number?
Not necessarily. 71 is a prime number, 7 is a prime number, and 71-7= 64, which is NOT a prime number. In most cases, the difference of two prime numbers will not be a prime number. All prime numbers greater than 2 will be odd numbers. The difference between two odd numbers will be an even number. Unless that even number is 2, it is not a prime number. Here are some additional examples: 19, 13: difference 6, not prime 23, 7: difference 16, not prime 53, 31: difference 22, not prime 61, 59: difference 2, prime 113, 109: difference 4, not prime 293, 283: difference 10, not prime 331, 101: difference 230, not prime
Are all prime numbers even?
Almost all prime numbers are odd. There is only one prime number that is even - the number 2. A prime number is a number with two and only two factors: 1 and itself. All even numbers greater than 2 are divisible by 2, which means they have more than two factors, so they cannot be prime numbers.All prime numbers except 2 are odd.
