19

This number is a prime.

Single Curio View:   (Seek other curios for this number)
Khwārizmi (Father of Algebra) wrote several other works including a treatise on the Hebrew calendar, titled Risāla fi istikhrāj ta’rikh al-yahūd ("Extraction of the Jewish Era"). It describes the Metonic cycle, a 19-year intercalation cycle; the rules for determining on what day of the week the first day of the month Tishrei shall fall. [Nazeri]

Submitted: 2021-05-23 04:19:51;   Last Modified: 2021-06-04 21:38:16.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell