/usr/share/sagemath/ellcurves/rank20 is in sagemath-database-elliptic-curves 0.8-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | 73813242020125452593092920037241715783942979322145629022774016712292126930 a 1 [1,0,0,-431092980766333677958362095891166,5156283555366643659035652799871176909391533088196] 20 1
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