# RUN\_ID / SLUG

The `RUN_ID` variable contains a cryptographically secure ID associated with each run of your project. This is automatically generated when you use `prism run` or `prism spark-submit`.

The `SLUG` variable contains a slug for each run of your project. Note that the `SLUG` is not cryptographically secure, but it much more human-readable than `RUN_ID`. It is automatically generated when you use `prism run` or `prism spark-submit`.

Your run's `SLUG` is displayed in the logs when you run your project:

```
$ cd my_first_project
$ prism run
--------------------------------------------------------------------------------
<HH:MM:SS> | INFO  | Running with prism v0.2.0rc2...
<HH:MM:SS> | INFO  | Found project directory at /my_first_project
 
<HH:MM:SS> | INFO  | RUNNING parsing prism_project.py................................................ [RUN]
<HH:MM:SS> | INFO  | FINISHED parsing prism_project.py............................................... [DONE in 0.03s]
<HH:MM:SS> | INFO  | RUNNING module DAG.............................................................. [RUN]
<HH:MM:SS> | INFO  | FINISHED module DAG............................................................. [DONE in 0.01s]
<HH:MM:SS> | INFO  | RUNNING creating pipeline, DAG executor......................................... [RUN]
<HH:MM:SS> | INFO  | FINISHED creating pipeline, DAG executor........................................ [DONE in 0.01s]
 
<HH:MM:SS> | INFO  | ===================== tasks (vermilion-hornet-Gyycw4kRWG) =====================
<HH:MM:SS> | INFO  | 1 of 2 RUNNING EVENT 'decorated_task.example_task'.............................. [RUN]
<HH:MM:SS> | INFO  | 1 of 2 FINISHED EVENT 'decorated_task.example_task'............................. [DONE in 0.02s]
<HH:MM:SS> | INFO  | 2 of 2 RUNNING EVENT 'class_task.ExampleTask'................................... [RUN]
<HH:MM:SS> | INFO  | 2 of 2 FINISHED EVENT 'class_task.ExampleTask'.................................. [DONE in 0.01s]
 
<HH:MM:SS> | INFO  | Done!
--------------------------------------------------------------------------------
```

In the above example, `vermilion-hornet-Gyycw4kRWG` is your run's `SLUG`.

{% hint style="warning" %}
**Important**: if your `prism_project.py` file does not have a `RUN_ID` or `SLUG`, then Prism will throw an error. Make sure these are defined.
{% endhint %}