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97
Prime. Take a near square root of your number; round it off to the next higher value, you will get a number say X. Check whether X divdes your number finitely, if yes then that number is composite else prime.
97 is a prime number. Thus its prime factorisation is itself: 97. (1 is NOT a prime number.)
97 is a prime number.
The prime factors of 97 are 1 and 97. Thus, 97 is a prime number.