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Except for 2 all other prime numbers are odd. Otherwise, they would be divisible by 2 (and thus not a Prime number). This does NOT mean that all odd numbers are prime, but that all prime numbers (aside from 2) are odd.

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โˆ™ 2009-08-18 17:04:28
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Q: Is a prime number always an odd number?
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Related questions

Are odd numbers always a prime number?


Can a perfect square be a prime number Explain?

No. A prime number is always odd.

Is a prime number always odd?

Kind of. The only prime number that is even is 2.

Are prime numbers always odd?

Yes, except for the number 2.

Is it true that the sum of two prime numbers is always an even number?

Not quite.When two prime numbers of 3 and higher are added together, the result is always even, because all such prime numbers are odd numbers, and when two odd numbers are added together, the result is always an even number.However 2 is a prime number, and 2 is also an even number. Adding 2 (an even number) to a different prime number (an odd number) will always yield an odd number.Only if you don't include "2".

Is the product of any two odd number always prime?

no because 5x3 is 15 and 15 is not a prime number

Does two prime numbers always add up to an even number?

No, they do not. If one of the prime numbers is 2, you will have an odd number.

What is the least odd prime number?

3 is the smallest odd prime number.

What is the lowest odd prime number?

The lowest odd prime number is 3 .

Is every odd number a prime?

No. 15 is odd, but not a prime.

Are odd numbers composite numbers?

Some are. However prime numbers are always odd, with the exception of the number 2.

Will a prime number always have an odd numbers of factors?

All prime numbers have only 2 factors which are themselves and one. Al prime numbers are odd numbers except for 2 which is the only even prime number.

Is a prime number odd?

All prime numbers are odd except one prime number and that is 2.

Is the product for any two prime numbers always odd?

No. 2 is a prime number, and any product of 2 and another prime number will be even.

Which is the smallest odd prime number?

3 is the smallest odd prime number.

Is 2 an odd prime number?

NO,2 is the only prime number which is even, so 2 is not a odd prime number.

Why are square numbers one less than a prime number always even?

Prime numbers, except 2, are always odd (they would not be prime if they were even cos they would be divisible by 2.) 1 less than any odd number must be an even number.

How your prime number are odd or even?

Every prime number is odd except one: the number 2.

What is the difference between odd nos and prime nos?

odd is a number you cant halve a prime number is a number that you can double itself and it is odd

Why prime numbers arnt always odd?

The only prime number which isn't odd is the number 2. As the only things it is divisible by is 2 and 1. Therefore is prime. All other even numbers can be divided by 2, so are not prime.

If you subtract an odd number from a prime number can the result be prime?

Yes it can if the result is 2, else it can't because an odd number - an odd number = an even number, and 2 is the only even prime.

Is a prime number odd or even?

There is one even prime number (2); the rest are odd.

What is Successor of the even prime number?

The only even prime number is 2, then its successor is 3

If you add or subtract using only prime numbers is the answer always a prime number?

No, as all prime numbers are odd, excluding 2, and when you add two odd numbers you get an even number. This even number can't be a prime number as it will be divisible by 2. 101 and 31 are both prime, but 101+31 is 132.

Which numbers illustrate that not all prime numbers are odd?

2 is the only prime number that is not an odd number.