It is prime, because its only factors are 53 and 1.
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53 is a prime number
There is none because 53 is a prime number.
83, 53 and 67 are prime, the rest are composite.
53 is a primee 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.
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. 53 is prime, 54 is composite.