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. 115 is composite.
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113 is a prime number. 111 and 115 are composites.
127
115 is a composite number. This means it can be divided by other numbers besides 1 and itself. 115 can be divided by 1, 5, 23, and itself.115 is a composite number. It ends with 5 and is divisible by 5.
The prime numbers (factors) of 115 are: 5 and 23
The LCM (Least Common Multiple) of 115 and 15 is 345. The prime factors of 115 are 5 and 23. The prime factors of 15 are 3 and 5. Multiply the smallest encountered number of same factors, 3, 5, and 23, to get 345.