312 is a composite number.
Just looking at it, without any fancy mental math, you can see that it's evenly
divisible by 2 and 3. In fact it is 2 x 2 x 2 x 3 x 13.
The important fact : Every even number except 2 is composite.
You can easIly figure this out by using the fact that all even numbers are Divisible by 2. Because 312 is even it to Is also divisible by 2. Because 312 can be divided by mOre than itself and one, which is what a prime number is, it is composiTe.
To find the prime factors of 312 start with any factor pair of 312 and keep factoring the composite numbers until all factors are prime. 312 2 x 156 2 x 2 x 78 2 x 2 x 2 x 39 2 x 2 x 2 x 3 x 13 A number of a prime factor of 312 is 2, 3, or 13.
Since 312 is an even number greater than 2, it is a multiple of 2 and therefore composite. Its positive integer factors are: 1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312
The composite factors of 312 are 4, 6, 8, 12, 24, 26, 39, 52, 78, 104, 156, 312
The prime factors of 312 are: 2, 3, 13
neither prime or composite
It is prime
It would be impossible to list them all, since numbers go on forever, but here are some of them: 2 - Prime 3 - Prime 4 - Composite 5 - Prime 6 - Composite 7 - Prime 8 - Composite 9 - Composite 10 - Composite 11 - Prime 12 - Composite 13 - Prime 14 - Composite 15 - Composite 16 - Composite 17 - Prime 18 - Composite 19 - Prime 20 - Composite 21 - Composite 22 - Composite 23 - Prime 24 - Composite 25 - Composite 26 - Composite 27 - Composite 28 - Composite 29 - Prime 30 - Composite 31 - Prime 32 - Composite 33 - Composite 34 - Composite 35 - Composite 36 - Composite 37 - Prime 38 - Composite 39 - Composite 40 - Composite 41 - Prime 42 - Composite 43 - Prime 44 - Composite 45 - Composite 46 - Composite 47 - Prime 48 - Composite 49 - Composite 50 - Composite
4, composite. 67, prime.
Prime
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
5 prime, 25 composite.