Instructional Video
Khan Academy

Khan Academy: Arithmetic and Pre Algebra: Prime Factorization

6th - 8th
This video shows how to find the prime factorization of a two-digit number and write the answer in exponential notation. Practice problems available. Practice problems are available. [4:09]
Instructional Video
Sophia Learning

Sophia: Factoring Monomials: Lesson 11

9th - 10th
This lesson will cover how to factor the coefficient separately from each variable in order to factor a monomial. It is 11 of 11 in the series titled "Factoring Monomials."
Instructional Video
Sophia Learning

Sophia: Factoring Monomials: Lesson 7

9th - 10th
This lesson will cover how to factor the coefficient separately from each variable in order to factor a monomial. It is 7 of 11 in the series titled "Factoring Monomials."
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: The Prime Number Theorem

6th - 8th
How can we estimate the number of primes up to x?
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Algorithmic Efficiency

5th - 8th Standards
How can we improve the speed of a (deterministic) primality test?
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Primality Test

6th - 9th
Setting up the problem of a primality test.
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Primality Test With Sieve

6th - 9th
An attempt at an optimal trial division primality test using the Sieve of Eratosthenes.
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Summary (What's Next?)

6th - 9th
Why is factorization hard, yet generating primes easy? Where do we go from here?
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Time Space Tradeoff

9th - 10th
What is our memory limit? How can save time at the expense of space?
Instructional Video
Khan Academy

Khan Academy: Randomized Algorithms: Random Primality Test (Warm Up)

9th - 10th
Introduction to random primality tests & how they will work (warm up).
Instructional Video
Khan Academy

Khan Academy: Computational Number Theory: Sieve of Eratosthenes

5th - 8th
Sieve of Eratosthenes allows us to generate a list of primes.
Instructional Video
Math Playground

Math Playground: What Is a Prime Number?

4th - 6th Standards
This video defines prime numbers by examining the concept of factors. [4:42]
Instructional Video
TED Talks

Ted: Ted Talks: Harry Baker: A Love Poem for Lonely Prime Numbers

9th - 10th
Watch this TEDTalk by "poet and math student" Harry Baker as he combines words and number concepts into love poetry.
Instructional Video
Khan Academy

Khan Academy: Prime Factorization Exercise

5th - 6th
Demonstrates how to find the prime factors of whole numbers. [3:49]
Instructional Video
Khan Academy

Khan Academy: Recognize Prime and Composite Numbers

4th Standards
Looks at how to recognize prime and composite numbers and ones that don't fit into either category. [4:39]
Instructional Video
Virtual Nerd

Virtual Nerd: What's a Prime Number?

9th - 10th
Instructional video explores how prime numbers are defined. [1:31]
Instructional Video
Khan Academy

Khan Academy: Prime Factorization: Prime Factorization

6th - 8th
This video shows how to find the prime factorization of a two-digit number and write the answer in exponential notation.
Instructional Video
Khan Academy

Khan Academy: Vi Hart: Doodling in Math: Sick Number Games

9th - 10th
Video demonstrating some number games that involve mathematical concepts of number theory such as prime numbers, Pascal's triangle, and the Sierpinski triangle. [5:28]
Instructional Video
Khan Academy

Khan Academy: Doodling in Math: Doodling in Math: Sick Number Games

9th - 10th
Video demonstrating some number games that involve mathematical concepts of number theory such as prime numbers, Pascal's triangle, and the Sierpinski triangle.
Instructional Video
Khan Academy

Khan Academy: The Fundamental Theorem of Arithmetic

9th - 10th
In this video lesson students explore the fundamental theorem of arithmetic. Student learn about prime and composite numbers.
Instructional Video
Khan Academy

Khan Academy: Prime Numbers: Prime Numbers

4th - 8th Standards
Video identifying prime numbers.
Instructional Video
Khan Academy

Khan Academy: Prime Numbers

4th Standards
Discusses the properties of prime numbers and how to recognize them. [8:12] It includes a link to a practice exercise.
Instructional Video
Khan Academy

Khan Academy: Prime Factorization: The Fundamental Theorem of Arithmetic

9th - 10th
This video walks through the "Fundamental Theorem of Arithmetic".
Instructional Video
Art of Problem Solving

Art of Problem Solving: How to Tell if a Number Is Prime

9th - 10th
Video tutorial uses examples to reinforce understanding of how to tell if a number is prime. [9:39]