Prime Numbers: Summary: Prime Numbers
This clip summarizes prime numbers, explaining the difference between prime and composite numbers, and demonstrating how to use the sieve of Eratosthenes to find prime numbers. The clip also explains prime factorization, stating that every whole num...
Prime Numbers: Prime and Composite Numbers
This clip explains the difference between prime numbers and composite numbers. It also talks about how the Greeks figured out which numbers are primes and which are not.
Prime Numbers: Prime Factorizations
This clip explains that when the factorization of a whole number consists entirely of prime numbers (as with the number thirty, factored into two times three times five), the result is what's known as a prime factorization.
Prime Numbers: Another Method of Finding Prime Factors
This clip explains that with larger numbers, it's more difficult to "Â…just examine the number, see some factors, examine those and so on until you're done." In such cases, the clip explains, there's another method of finding prime factors, which co...
Prime Numbers: Factors of Thirteen
This clip contrasts the number twelve, which can be factored in several ways, with the number thirteen, which can only be factored as thirteen times one. The clip states that the question of whether or not a whole number has smaller factors becomes ...
Prime Numbers: Introducing Factoring
This clip introduces factoring, explaining in the process that every number equals itself times one, and that the order of the numbers doesn't matter in factoring.
Prime Numbers: Method of Finding Prime Factors, A
This clip states one of the most basic laws of arithmetic: every number has one and only one prime factorization. The clip also explains how to determine that factorization, using a process known as branching. The clip also states that prime factori...