/usr/share/sagemath/ellcurves/rank23 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 | 113964706497998622564257410134352232583764612126645513242486361984405434455972952111271430 a 1 [1,0,1,-19252966408674012828065964616418441723,32685500727716376257923347071452044295907443056345614006] 23 1
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