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The Number 172: Properties and Meanings
Prime Factors of 172=2x2x43.172 is a 30-gonal Number.
172 is the maximal number of regions into which 18 lines divide a plane.
The Year 172 AD
In the year 172 AD ...0 - 500 | 501 - 1000 | 1001 - 1500 | 1501 - 2000 | 2001 - 2500
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