5 is a Prime number. It is only evenly divisible by itself and one.
5 is a prime number, so the only prime factor of 5 is itself.
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The prime factor of 125 is 5.
1 and 5 5 is prime.
5 + 2 = 7
Prime factors of 1225 are 5, 5, 7, and 7.
1 is a factor of 5 which is a prime number