There is no specific name. Such numbers include all irrational numbers, all non-integral rational numbers, 0 and 1.
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Numbers that are not prime numbers are called composite numbers.
They are the composite numbers, products of primes and their multiples. All even numbers are composite, except the number two (2) which is prime.
No. Prime numbers cannot be composite and composite numbers cannot be prime!
Let's say that the concept of "prime numbers" and "composite numbers" is defined for a certain class of numbers, specifically, positive integers, 2 or greater.
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.