1 | initial version |

Given the error message in

```
>./factor 2006
/usr/bin/env: sage -python: No such file or directory
```

It looks like "sage" can't be found, so I would guess that you haven't followed this direction from the tutorial:

In order to use this script, your SAGE_ROOT must be in your PATH.

I don't know how to do this using VirtualBox, but it might be this: find the directory `SAGE_ROOT`

where `sage`

is; say it's "/home/user/sage-5.3/". Then do

```
> export PATH=/home/user/sage-5.3/:$PATH
```

(There should be exactly one space in this line, between "export" and "PATH".) Then try

```
> ./factor 2006
```

again.

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