259is a prime number

Dear Student
259 is not a prime number
The list of all positive divisors (i.e., the list of all integers that divide 259)  : 1,7,37,259

To be 259 a prime number, it would have been required that 259 has only two divisors, i.e., itself and 1 
but here we have other number that  divide 259
so it  is not a prime 
Regards

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