The Number 86: Properties and Meanings

Prime Factors of 86=2x43.

86 can be Partitioned 44 times with each term no larger than 2.

86 can be Partitioned 660 times with each term no larger than 3.

86 is the total number of parts in all Partitions of 8.

An ancient tablet was discovered with 86 notches on it.

"The tablet may also be a pregnancy calendar. There are 86 notches on the tablet, a number that has two special meanings. First, 86 is the number of days that must be subtracted from a year to equal the average number of days of a human gestation. This is no coincidence, says Dr Rappenglueck. 86 is also the number of days that one of Orion's two prominent stars, Betelguese, is visible. To ancient man, this might have linked human fertility with the gods in the sky."
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The Year 86 AD

In the year 86 AD Antoninus Pius, who became a Roman emperor, was born.