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99 is the largest composite number less than 100: its prime factorisation is 3 x 3 x 11
There are 25 prime numbers less than 100
88 is a composite number because it is an even number. All numbers greater than 8 and less than 100 are composites if they are even numbers, if they are multiples of 3 or 7, or if they end in 5 or 0.
The product of the prime numbers less than 100 is 2.3055679639455188e+36
The total number of prime numbers less than 100 is 25.