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1,2,3,5,7,11,13,17,19,23,29,31.... A prime number has exactly two factors. 2 is prime (its factors are 1 and 2) 3 is prime (its factors are 1 and 3) 5 is prime (its factors are 1 and 5) 1 is not prime (its only factor is 1, this is 1 factor, not 2) 4 is not prime (it has 3 factors: 1, 2, and 4) 6 is not prime (it has 4 factors: 1, 2, 3, and 6)
1-10 AD had the years 2, 3, 5, and 7, which were prime numbers.
Prime numbers from 1 to 12: 2, 3, 5, 7, 11Composite numbers from 1 to 12: 4, 6, 8, 9. 10. 12
1 is neither a prime or composite because it has one factor. 2 is prime because it's only factors are 1 and itself. 4 is composite because it has 3 factors: 1, 2, and itself.
1, 2, 4, 7, 8, 14, 28, 56 2 and 7 are prime.