Drexel dragonThe Math ForumDonate to the Math Forum

Ask Dr. Math - Questions and Answers from our Archives
_____________________________________________
Associated Topics || Dr. Math Home || Search Dr. Math
_____________________________________________

Prime Factors

Date: 01/28/2006 at 18:59:06
From: Cookie
Subject: (no subject)

What is a number with only two prime factors and no repeated factors?



Date: 01/28/2006 at 23:09:18
From: Doctor Ricky
Subject: Re: 

Hi Cookie,

Thanks for writing Dr. Math!

Actually there are an infinite number of numbers with only two prime 
factors and no repeated factors.  To find one, think of two prime 
numbers.  Now multiply them together once (so there are no repeated 
factors).  Your result is a number with only two prime factors and 
no repeated factors. :-)

Example:

Pick two prime numbers.  How about 2 and 3?

Now, multiply them together once.

  2*3 = 6

Therefore, 6 has only two prime factors and no repeated factors.

If you have any questions or if this was a little confusing, please 
let me know!

- Doctor Ricky, The Math Forum
  http://mathforum.org/dr.math/ 
Associated Topics:
Middle School Factoring Numbers
Middle School Prime Numbers

Search the Dr. Math Library:


Find items containing (put spaces between keywords):
 
Click only once for faster results:

[ Choose "whole words" when searching for a word like age.]

all keywords, in any order at least one, that exact phrase
parts of words whole words

Submit your own question to Dr. Math

[Privacy Policy] [Terms of Use]

_____________________________________
Math Forum Home || Math Library || Quick Reference || Math Forum Search
_____________________________________

Ask Dr. MathTM
© 1994-2013 The Math Forum
http://mathforum.org/dr.math/