The Largest Known Primes

Are you looking for the largest known primes?  Lists of records?  Information on who finds the biggest primes (and how?)  You are at the right place!  Here we keep the list of the 5000 largest known primes, updated hourly (hundreds of new primes are submitted every month).  We are the world's primary source to the current prime number records.

1. The current list of primes
   • One page summary (introduction and a few records)
   • Downloading the list of the largest known primes
   • Search the database of primes
   • The Top 20 Primes of Selected Forms
2. Background information
   • A short introduction to primes
   • How do you prove large numbers are prime?
   • How can I find a record prime? (current top programs)
   • What projects might I join? current top projects
3. Tell me more!
   • The Prime Glossary -- definitions of prime terms
   • Answers to frequently asked questions
   • Prime Curios! amazing and odd facts about prime numbers
   • Who found these primes?

Note: these are the largest known primes--so they are very big (most have hundreds of thousands of digits!)  If you want smaller primes, say the first ten thousand primes or first hundred million primes, see lists of small primes.