Math & English Education : Steps to Finding a Prime Number

A prime number is a number that only has two factors, which are itself and the number one. Learn about divisibility rules that help to find prime numbers with information from a standardized test prep instructor in this free video on math and education.

Expert: Brian Leaf
Contact: www.brianleaf.com
Bio: Brian Leaf, MA, is the author of McGraw-Hill's Top 50 Skills for SAT/ACT Success series and has instructed SAT, ACT, GED and SSAT preparation to thousands of students.
Filmmaker: David Pakman

Category:

Howto & Style

Tags:

• education
• teaching
• tutoring
• testing
• math
• mathematics
• learning
• high school
• English
• standardized tests

[acdcrockist]

thx u a good help!

[SpaceBandit666]

Thank you!

[MegaScottie12]

Thankyou so much. This really helps. I have an end of year Maths exam tomorrow and it's a biggie. I hope this will help me to get better grades, because to be honest I only knew what prime numbers were, not even the prime numbers to 100. Thankyou . :) xx

[thimmyb]

@Entertainmentwf Where can I learn more about the general methods that works with larger prime numbers?

[thinkstrait]

no trick for 7's?

[simirkhan]

thnk you soo much sir for ur help, it is very very helpful in fact i now knw wat a prime number is and how to find it in an easy way. again thank you soo much for spending your own time making this usful video, which everyone can learn from it, i think this is just fantastic.

[TheUndeadSgtTv]

a i need to make a longest combination for 76 125 120 and 1200 only with prime numbers im confused

[libeeday]

Thank you, I never could really get it or remember it later. Now the mathmatically illiterate person is no longer illiterate on this subject. Honestly, what a life saver. (because, I couldn't have gotten it to save my life before)

[Entertainmentwf]

Great video. The only problem with this trick is it is not a general method. There are many more efficient ways which are general to determine a prime. Some computational, and some are axiomatic.

[msbooty1976]

thank u for sharing