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Because the concept of prime or composite is defined for whole numbers which are greater than 1. 1 is not divisible by any number except for 1 and itself (also 1). From that perspective, it should be classed as a prime. However, if 1 were considered a prime than the fundamental theorem of arithmetic - the unique prime factorisation theorem - would fail, and with it much of the theory of multiplication and division would collapse.
What else can I help you with?
Is 0 and 1 a prime or composite number?
0 and 1 are neither prime nor composite. No.
Is 576 a prime or composite number?
576 is a composite number. 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.
Which number is not a prime or a composite number?
1 is neither prime nor composite.
Is 1851 a composite or prime number?
1851 is a composite number. 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.
Is 1331 a composite or prime number?
1331 is a composite number. 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.
Is 726 a prime or composite number?
726 is a composite number. 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.
Is 753 a prime or composite number?
753 is a prime number. 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.
Is 4564282 a prime or composite explain how you determined your answer?
4564282 is a composite number. 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.
Is 0 or 1 a prime number?
1 is a prime number, but 0 is neither a prime number nor a composite number.
Is 1 a prime composite or neither?
1 is not considered to be a prime or a composite number
What is 120 is it a prime or composite number?
120 is a composite number. 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.
Is 899 a prime or composite number?
899 is a composite number. 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.
