###### Asked in Prime Numbers

Prime Numbers

# Is 128 prime?

## Answer

###### Wiki User

###### March 06, 2011 12:22AM

No, it is not prime.

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### Is 128 composite or prime?

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### Factors for 128?

###### Asked in Prime Numbers

### What is the prime factorization for 128?

Prime factorization is breaking down a number into all of the
prime numbers that make it up.
For example, in 128, since it is even, the easiest first step
would be diving by two, a prime number.
64 * 2 = 128. Now divide 64, another even number, by two.
32 * 2 * 2 = 128. Divide 32 by two.
16 * 2 * 2 * 2 = 128. Divide by two again.
8 * 2 * 2 * 2 * 2 = 128. Divide by two again.
4 * 2 * 2 * 2 * 2 * 2 = 128. Divide by two a final time.
2 * 2 * 2 * 2 * 2 * 2 * 2 = 128. This is your prime
factorization.
But you write it condensed, so 27 would be the
prime factorization for 128.