| Ratings | Users | Items | Density | Start | End | |
|---|---|---|---|---|---|---|
| Set | ||||||
| ML100K | 100 k | 943 | 1.68 k | 0.063047 | 1997-09-20 | 1998-04-22 |
| ML1M | 1.00 M | 6.04 k | 3.71 k | 0.044684 | 2000-04-25 | 2003-02-28 |
| ML10M | 10.0 M | 69.9 k | 10.7 k | 0.013403 | 1995-01-09 | 2009-01-05 |
| ML20M | 20.0 M | 138 k | 26.7 k | 0.005400 | 1995-01-09 | 2015-03-31 |
| ML25M | 25.0 M | 163 k | 59.0 k | 0.002605 | 1995-01-09 | 2019-11-21 |
| ML32M | 32.0 M | 201 k | 84.4 k | 0.001886 | 1995-01-09 | 2023-10-13 |
MovieLens
MovieLens is a movie recommendation site producing data sets that are widely used for recommender systems research. The data sets can be obtained from GroupLens.
