Welcome to the Prime Numbers Wiki!

Welcome to Prime Numbers Wiki! In this wiki, we will post all the prime numbers that are in a range of 100. Here, we can even post videos of our own, summarizing the page, e.g. showing the prime numbers on 1-100, the difference between prime and composite numbers, and many more about the topic. Even the Sieve of Eratosthenes will help us show the correct way of showing primes. Come, join now! Making links will be a great way to show the proof of why it is prime; just give a subjective detail of the number, e.g. this number is prime because it is not divisible by 2, then show the answer. Dead-end links will make our wiki a rotten one, so please add some links to those numbers. We can even make a bunch of pages!

#4. What is the 50th prime number?

The poll was created at 05:10 on December 7, 2013, and so far 6 people voted.

Look at our YouTube videos online: [1] Look at our videos, like the prime numbers in a range. We would love to see your comments on our videos, and how can we improve them! Just a click of a button, I guess! Press the link above!

Important Pages!

Here are some pages to know before getting started to add a page on our encyclopedia of 856 pages.

Now, check out the Sieve of Eratosthenes. This helps on getting the primes on any range, e.g. a range of 100, 10 by 10. This is actually effective for primes below 10 million.

Prime Slideshow
WAM Score of PNW

46.42, down by 2.99 points. Were we inactive yesterday?

Featured User of the Month!
User:3primetime3 because he has beat the founder's edit count, and has added prime numbers pages, such as the largest known prime number, and some things to know if a number is prime or not, e.g. Divisibility Rules. He has also created the questions of the day. Check out his blog posts!
Featured Article

Featured Article: Sieve of Eratosthenes

In mathematics, the sieve of Eratosthenes (Greek: κόσκινον Ἐρατοσθένους), one of a number of prime number sieves, is a simple, ancient algorithm for finding all prime numbers up to any given limit. It does so by iteratively marking as composite (i.e. not prime) the multiples of each prime, starting with the multiples of 2.

The multiples of a given prime are generated as a sequence of numbers starting from that prime, with constant difference between them which is equal to that prime. This is the sieve's key distinction from using trial division to sequentially test each candidate number for divisibility by each prime. Read more...

Featured Video
Prime Numbers - The Sieve of Eratosthenes

Prime Numbers - The Sieve of Eratosthenes


Since November 16, 2013, Saturday, this wiki has 856 pages in Prime Numbers Wiki, 22,743,107 users in the whole Wikia and this, and 6 administrators to help you in your journey through the whole wiki.

Question of the Day!

Hey everyone,

I wonder why a lot of people stopped participating.  Are you guys getting bored?  Well, hope this question stimulates your brain a little.  It is hard making math questions fun!

Question of the Day - 15 points

What is the product of x and y if x^2 + y^2 = 36 - 2xy and x^2 - y^2 = 12 ?

Difficulty: Easy

Previous Solution

I believe the previous solution was 4, not 2013 or 8.  If you disagree, PLEASE state why.

If 4 people paints 4 walls in 4 minutes, assuming these people are professional and paints at a constant rate, that means 1 person paints 1 wall in 4 minute.  All of them work together at the same time.  They do not take turns painting each wall.  Therefore, changing the ratio to 2013 painters with 2013 walls, it still doesn't change how many minutes the person takes.  The answer, for sure, is not 2013.

Blueeighthnote, how did you solve this question?  I don't understand why you got 8.

Credits to the MathCounts Foundation for this question.  Don't worry Julianthewiki, I made the same mistake as you.


1.  Blueeighthnote: 580 points

2.  Julianthewiki: 20 points

3  Wildoneshelper: 10 points

3.  Zombiebird4000: 10 points 

5. 10 points

6.  TimBluesWin:  10 points


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