25 is a composite number because it has at least one positive factor other than one or itself.
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42 is a Composite Number.
25 is not a prime number since it can be evenly divided by 5 as well as 1 and 25.
The greatest prime number below 25 is 23.
The only prime number between 25 and 30 is 29.
The prime factorization of 25 is 5 x 5.