Are prime numbers weird?

First, except for the number 2, all prime numbers are odd, since an even number is divisible by 2, which makes it composite. So, the distance between any two prime numbers in a row (called successive prime numbers) is at least 2.

How many different prime factors are factors of the positive integer n?

(2) Four different prime numbers are factors of n� implies four different prime numbers are factors of n as well; SUFFICIENT. The correct answer is B. This discussion on How many different prime numbers are factors of the positive integer n?

Why are prime numbers positive?

Prime numbers are natural numbers that are only divisible by 1 and the number itself. In other words, prime numbers are positive integers with exactly two factors, 1 and the number itself.

What is the least positive whole number divisible by four different prime numbers?

210
Answer: 210 is the smallest number having four different prime factors.

What is the least positive integer that is not a factor of 25 and is not a prime number?

58
58 is the only number that is not a prime and also not a factor of 25!

How many positive integers are divisible by 1 or itself?

In all the positive integers given above, all are either divisible by 1 or itself, i.e. precisely two positive integers. The smallest prime number defined by modern mathematicians is 2. To be prime, a number must be divisible only by 1 and the number itself which is fulfilled by the number 2.

What is a prime number with no positive divisors?

For example, 5 is a prime number because it has no positive divisors other than 1 and 5. The first 49 prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, and 227.

What is the only integer that is not a prime number?

All positive integers greater than 1 are either prime or composite. 1 is the only positive integer that is neither prime nor composite. Prime numbers are critical for the study of number theory. Nearly all theorems in number theory involve prime numbers or can be traced back to prime numbers in some way.

How do you know if an integer is prime or composite?

Every integer greater than 1 is either prime (it has no divisors other than 1 and itself) or composite (it has more than two divisors). Furthermore, every integer greater than 1 has a unique prime factorization up to the order of the factors.

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