Is 99 a Prime Number?

No, 99 is not a prime number, it is a composite number.

99 Not a Prime Number Proof with Adraktas Formula

X = 99

a5 = [ X - 5 ] / 6
a5 = [ 99 - 5 ] / 6
a5 = 15.6666666667
a5 is not integer

a7 = [ X - 7 ] / 6
a7 = [ 99 - 7 ] / 6
a7 = 15.3333333333
a7 is not integer

Both a5 and a7 is not integer.

99 is not a prime number

Why 99 is not a prime number?

Because 99 has divisors rather than 1 and itself. 99 can be divided by 3 and 3.

Prime factorization of 99 (list of divisors):

  • 3
  • 3
  • 11

The next prime number of 99 is 101
The previous prime number of 99 is 97.


Related Prime Numbers

Biggest 10 prime numbers smaller than 99

Smallest 10 prime numbers bigger than 99

Related Non-Prime Numbers

Biggest 10 composite numbers smaller than 99

Smallest 10 composite numbers bigger than 99