What is a prime numbers and a composite numbers?
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Definition: A prime number is a whole number with exactly two integral divisors, 1 and itself. ... Definition: A composite number is a whole number with more than two integral divisors. So all whole numbers (except 0 and 1 ) are either prime or composite. Example: 43 is prime, since its only divisors are 1 and 43 .
Answer:
A prime number has only two factors:1 and itself..
A composite number has more than two factors..
The prime numbers between 2 and 31 are 2,3,5,7,11,13,17,19,23,29 and 31 since each of these numbers has only two factors itself and 1.