This is a repository of the data files containing the Cremona Database of all elliptic curves over Q of bounded conductor. The data is available under TheArtistic License 2.0: see the file LICENSE for details.
These files provide the source data for the elliptic curve pages at http://www.lmfdb.org .
The current release is published as http://dx.doi.org/10.5281/zenodo.161341
For a description of how most of the data here was computed, see the ANTS 7 Proceedings at http://www.math.tu-berlin.de/~kant/ants/proceedings.html . For a description of the algorithms used, see the book Algorithms for Modular Elliptic Curves, published by CUP in 1992 (second edition 1997) and available online here: http://www.warwick.ac.uk/staff/J.E.Cremona/book/fulltext/ .