"The problem of distinguishing prime numbers from composite numbers and of resolving the latter into their prime factors is known to be one of the most important and useful in arithmetic." Carl Friedrich Gauss

Home - Facts - Quiz - Ratios - Countries

News - Love of Numbers - Big Numbers - Landmarks

Test Yourself

Which of these has the least mass? ...

Mass of United States Postal service maximum parcel weight ...

Mass of an ostrich (approx) ...

Mass of a case of 12 bottles of wine ...

Mass of a large watermelon ...

Read all about it!

Is That a Big Number? - the book - is now available from all good booksellers.

"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine

Click here to learn more about it.

Click here for Podcast: Andrew Elliott interviewed for New Books Network.

http://itabn.tumblr.com/post/138631317782/this-website