Regular number
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Regular numbers are numbers that evenly divide powers of 60. Equivalently, they are the numbers whose only prime divisors are 2, 3, and 5. As an example, 602 = 3600 = 48 × 75, so as divisors of a powe
AO 6456, a table of reciprocals of regular numbers from Seleucid Uruk, copied from an unknown earlier source
Plimpton 322
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Plimpton 322 is a Babylonian clay tablet, believed to have been written around 1800 BC, that contains a mathematical table written in cuneiform script. Each row of the table relates to a Pythagorean t
Regular number
…calculations other than reciprocals also involved regular numbers. For instance, tables of regular squares have been found and the broken tablet Plimpton 322 has been interpreted by Neugebauer as listing Pythagorean triples ( p 2 − q 2 , 2 p q , p 2 + q 2 ) generated by p and q both regular and less than 60…
The Plimpton 322 clay tablet, with numbers written in cuneiform script