/usr/share/sagemath/ellcurves/rank19 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 | 137377583765207564914008156149740232282282540648823380362307893110 a 1 [1,-1,1,-2063758701246626370773726978,32838647793306133075103747085833809114881] 19 1
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