Showing posts with label list of primes. Show all posts
Showing posts with label list of primes. Show all posts

Tuesday, August 24, 2010

list of primes

Prime Numbers
In this section let me help you on list of primes. If a number does not have a factor beside 1 and itself, it is called prime.
Example :5 has no factor, whole numbers that can be divided by evenly, besides 1 and 5. It is therefore prime.20, and the other hand, the factors 1, 2, 4, 5, 10 and 20. Because it has factors beside 1 and itself (2, 4, 5 and 10), it is not prime.
Numbers that are not prime is called composite. 20 is a composite number.
Examples of prime numbers are 2, 3, 5, 7, 11 and 13.

Prime Factor:
The Factors are number you multiply to get other number. For instance , the factor of 15 are 5 and 3, because 5×3 = 15. Some numbers are more than one factors (more than one way of being factorization).This could also help us on date calculator number of days. For instance , 12 can be factored as the 1×12, 2×6, or 3×4. The number that can only be factors as 1 times itself is called prime. The few primes numbers are 2, 3, 5, 7, 11, and 13. The number 1 is not regards as to a prime, and is usually not included in factorizations.