# Number Gossip Links

If you are interested in numbers, here are some websites I can recommend.

- The On-Line Encyclopedia of Integer Sequences — Here you can plug in part of a sequence and find out a lot about it.
- What's Special About This Number? — A list of special properties for numbers up to 10,000.
- The Prime Pages — A lot of cool stuff about prime numbers.
- Cool Numbers — Calculates Coolness index of numbers, has a picture gallery of cool dollar bills.
- Wikipedia — An article about each integer.
- The On-Line Dictionary of Numbers — Here you can plug in a number up to 300,000,000 and get its prime factorization with some other properties.
- Positive Integers — Here you can plug in a number up to 1,000,000 and get its prime factorization with some other properties.
- The Pi-Search Page — Here you can find the first occurence of your number in Pi.
- The secret lives of numbers — Vizualization tool that allows you to see how many search hits each number gets.
- Integermania — Starting with four digits and a set of mathematical operations how many integers can you create? You can submit your solutions..
- MAA NumberADay — Number A Day blog posts a new number on every weekday.