The numbers 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97 are prime.
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The prime numbers for 99 are 11 and 33.
As a product of its prime factors: 3*3*11 = 99
Prime factorization of 99 = 3 * 3 * 11
98 if you exclude 0 and 99.
There are no negative prime numbers.