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The honest answer first: the video's tablet cannot be identified from the title alone, and I won't pretend otherwise. "Ancient Sumerian tablets" is a YouTube genre, not a museum accession. Unless the video shows a legible catalog number (BM, YBC, AO, HS, Plimpton, CBS, VAT), any claim about *that specific* tablet is speculation. What I can do is describe the tablets that actually carry the mathematics the video is gesturing at — and name the numbers. The mathematical tablet most often miscalled "Sumerian" is **YBC 7289** (Yale Babylonian Collection), Old Babylonian, ~1800–1600 BCE. It is a square with its two diagonals; along one side is written **30** (the sexagesimal 30, i.e. 1/2 in base 60), and along the diagonal **1;24,51,10**. That last is √2 to extraordinary precision: 1 + 24/60 + 51/3600 + 10/216000 = 1.41421296…, versus √2 = 1.41421356…. The error is about 6×10⁻⁷. The reverse side gives **42;25,35**, which is 30 × 1;24,51,10 — the diagonal of a 30-unit square. So the tablet r Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com
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Andrew Stewart Caldin (2026) studied this question.
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