A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 1021 is prime.
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To determine if 1021 is prime or composite, we can check if it has any factors other than 1 and itself. However, doing a full factorization of 1021 would be time-consuming. So, we can use other methods like checking if it is divisible by any primes less than its square root. After checking, we find that 1021 is a Prime number.
Only by itself and one because 1021 is a prime number
4, composite. 67, prime.
Prime
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
5 prime, 25 composite.