Parallel
Genesis 5:31
Swete's Septuagint · Berean Standard Bible
καὶ ἐγένοντο πᾶσαι αἱ ἡμέραι Λάμεχ ἑπτακόσια καὶ πεντήκοντα τρία ἔτη, καὶ ἀπέθανεν.
So Lamech lived a total of 777 years, and then he died.