# FAQ

**Is x prime?**

Please try our number cruncher. If your question is more complex then try using the contact form. I can't promise a quick response though.

**Can I have a copy of all 1.4 billion prime numbers that are on this site?**

Yes, but due to it's size it is only available as a bit torrent. The file is in the format of 1 prime number per line and can be downloaded here: Torrent. We have also compressed it using 7zip, if you don't have this fantastic open source software then it can be downloaded from http://www.7-zip.org/

**I've taken the time to send you an email. Why haven't you responded?!**

I apologise, I run this site in what little spare time I have. I read every email and do intend to respond to all emails. I have a backlog of about 6 months at the moment.

**I've found a bug/mistake on bigprimes.net!**

Please send me an email using the contact form.

**What is the first set of 100 numbers (e.g. 100-199, 1300-1399, 312300-312399) that does not contain a prime number?**

The first occurrence is between the prime numbers 1671781 and 1671907 on this page (near bottom of 3rd column).

**What is the smallest prime number that contains all digits 0 to 9 in sequence?**

100123456789

**What percentage of prime numbers end in 1,3,7 and 9?**

25% of prime numbers end in a 1

25% of prime numbers end in a 3

25% of prime numbers end in a 7

25% of prime numbers end in a 9