Find the greatest common factor. \[ 15, s^{3} \] Write your answer as a constant times a product of single variables raised to exponents.

To find the greatest common factor (GCF) of \( 15 \) and \( s^{3} \), we start with the number \( 15 \), which factors into \( 3 \times 5 \). Since \( s^{3} \) is a variable term with no numerical or variable components in common with \( 15 \), the only common factor they share is \( 1 \). Therefore, the GCF is: \[ 1 \] This means the greatest common factor can be expressed as \( 1 \times s^{0} \) since any variable raised to the power of zero equals \( 1 \). Thus, the final answer is: \[ 1 \cdot s^{0} \]