Logo          What is ABC@home?
ABC@home is an educational and non-profit distributed computing project finding abc-triples related to the ABC conjecture.

What is the ABC conjecture?

The ABC conjecture involves abc-triples: positive integers a,b,c such that a+b=c, a < b < c, a,b,c have no common divisors and c > rad(abc), the so-called radical of abc. The ABC conjecture says that there are only finitely many a,b,c such that log(c)/log(rad(abc)) > h for any real h > 1. The ABC conjecture is currently one of the greatest open problems in mathematics. If it is proven to be true, a lot of other open problems can be answered directly from it.

Why should I join?

The ABC conjecture is one of the greatest open mathematical questions, one of the holy grails of mathematics. It will teach us something about our very own numbers. Furthermore, the application of ABC@home is tiny, secure and stable, we like to keep things simple.

Who is involved?

The project is run by the Mathematical Institute of Leiden University as part of Reken mee met ABC

Minimum System requirements

  • min. 256MB ram free
  • 2 MB of free disk space
  • windows, linux, mac (recommended with a 64bit cpu)

User of the day

User profile Profile Trepe


9 April 2011
A quick update: A lot of spam profiles were removed in the last few days, do complain if we removed any legitimate ones by mistake! Also, preliminary data for all triples with c no more than 10^18 has been available from our data page for a while now, although it is (of course) still preliminary at this point. Many thanks to our dedicated users, and we've now moved onward to further reaches of the search space!

3 October 2010
ABC@home will be unavailable for some periods over the next few days.

24 August 2010
Binaries for all platforms have now been updated. There seem to be some issues with Windows 2000 hosts, which we'll try and fix in the next few days. Please report any other problems!


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