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A prime number is a number that is divisible only by 1 and itself; it has no other factors. A composite number is a number that is divisible by more than 2 numbers. The only factors of 79 are 1 and itself. Therefore, 79 is a prime number.
It means any number multiplied by one is itself. And any number divided by one is itself. One is the only number which has this distinctive property.
It is not a composite number. A prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. The only factors of 29 are 1 and 29, so it is a prime number.
Due to the property of uniqueness, the only whole number that equals 25 is 25 itself!
A prime number is a number that is divisible only by 1 and itself; it has no other factors. A composite number is a number that is divisible by more than 2 numbers. The only factors of 131 are 1 and itself. Therefore, 131 is a prime number.