בראשית, פרק ה׳, פסוק י״ז

The generations spanning from the dawn of humanity to the time of Noah are marked by exceptionally long lifespans. Far from being simple historical records, these vast ages often conceal unique and deliberate numerical structures beneath the surface.

In the case of Mahalalel, who lived for eight hundred and ninety-five years, this specific age is not a random figure. Rather, it relies on an ancient counting system based on the number sixty [קאסוטו]. According to this method, the foundation for calculating his life is nine hundred years. This base is mathematically constructed from three groups of sixty units, where each individual unit represents sixty months, or exactly five years.

Mahalalel's total lifespan is then determined by taking this base number of nine hundred and subtracting exactly one unit of sixty months. By removing these five years from the foundational number, the final count arrives at precisely eight hundred and ninety-five years, revealing a highly structured and systematic approach to recording his age.