/usr/share/sagemath/ellcurves/rank4 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 2 3 4 5 6 7 8 9 10 | 234446 a 1 [1,-1,0,-79,289] 4 1
545723 a 1 [0,0,1,-7,36] 4 1
842596 a 1 [0,0,0,-169,841] 4 1
926584 a 1 [0,0,0,-127,610] 4 1
1099496 a 1 [0,0,0,-172,820] 4 1
1109716 a 1 [0,0,0,-64,169] 4 1
1129211 a 1 [0,0,1,-19,60] 4 1
1142158 a 1 [1,-1,0,-1,73] 4 1
1162928 a 1 [0,0,0,-259,2194] 4 1
1175648 a 1 [0,0,0,-316,2080] 4 1
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