# composite numbers

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• September 10th 2009, 12:38 PM
dori1123
composite numbers
If $a, b \in \mathbb{N}$ and $2 \leq b \leq a$, then $a!+b$ is composite. Can I get some help with this?
• September 10th 2009, 12:52 PM
dori1123
Never mind, I got it.