The largest composite integer before 100 is 99 - its positive integer factors are 1, 3, 9, 11, 33, 99.
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99 is the largest composite number before 100.
97 and 4
The smallest three digit composite number is 100, and the largest two digit number is 99. 100-99=1.
Many prime numbers and many composite numbers.
100 is composite. 100 = 2 * 2 * 5 * 5 = 22 * 52