The GCF is the largest number that can divide both terms.
The prime factors of 8k are 2, 2, 2, and k (since 8 = 2^3).
The prime factors of 32 are 2, 2, 2, 2, and 2 (since 32 = 2^5).
The common factors are 2, 2, and 2 (three 2's). So, the GCF is 2 * 2 * 2 = 8.
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