To factor out the greatest common factor (GCF) from the polynomial \( 16a^5 - 16 \), we first identify the GCF of the terms.
The terms are:
- \( 16a^5 \)
- \( -16 \)
The GCF of \( 16a^5 \) and \( -16 \) is \( 16 \).
Now, we factor out \( 16 \):
\[ 16a^5 - 16 = 16(a^5 - 1) \]
So, the factored form is:
\[ 16(a^5 - 1) \]