The terms "composite" vs. "prime" apply to whole numbers. They don't make sense for decimals or fractions.
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All but 31 and 37 are composite.
128 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
31,37 are not composite
wowo is it a composite number dang how did I not see that...
No, it is not a composite number, it's a prime number.