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That depends what you need to "solve". If what you want to do is check whether a number is prime or composite, check whether it is divisible by 2, and then by all odd numbers up to the square root of your number. For example, for numbers up to 120, you only need to check whether they are divisible by 2, 3, 5, 7 (9 is composite, so you don't really need to check divisibility by 9). If your number is divisible by any such number, then it is composite; otherwise it is a prime.
There are more efficient methods, but they are also more complicated, and it really only makes sense to use them for much larger numbers.
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CoachA Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.
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Are prime numbers greater than 2 composite?
No. Prime numbers cannot be composite and composite numbers cannot be prime!
Which numbers are prime numbers and which are composite numbers from 1 to 100?
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.
Is it true that prime numbers have to be prime and composite?
Prime numbers can not composite as - Prime number has only 2 factors whereas composite have more than 2
Does the prime factorization of any composite number include prime and composite numbers?
Prime factorization never includes a composite number. All numbers in prime factorization must be prime numbers.
Are there more composite or prime numbers?
there are more composite numbers the prime becuz more things can be divided into
