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The Number 1722: Properties and Meanings
Prime Factors of 1722=2x3x7x41.1722 is a Giuga number.
The Year 1722 AD
In the year 1722 AD French C. Hopffer patented the fire extinguisher.0 - 500 | 501 - 1000 | 1001 - 1500 | 1501 - 2000 | 2001 - 2500
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