Section 1.5: Exponents and Prime Factorization
Links

Scientific Notation
This site presents a nice introduction and explanation of scientific notation. Sometimes the link shown below will route you to the main page. If that happens, simply click on "homework help" and enter the appropriate topic.
http://math.about.com/science/math/library/mathfiles/b1050-19a.html

Factors
This site present a list of prime factors for the numbers from 4 to 1000.
http://www.fact-index.com/t/ta/table_of_prime_factors.html

Factor Tree
This is an interactive site which will show you the factors of an input number.
http://www.mathepower.com/english/primfaktor.php

Karl Gauss
Did you notice the Historical Perspective at the beginning of this section? If you want some additional information, you can check out this site.
http://www-history.mcs.st-and.ac.uk/~history/Mathematicians/Gauss.html