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To get the Greates Common Factor (GCF) of 1859 and 715 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1859: || ||11||13||13|
|715: ||5||11||13|| |
|GCF: || ||11||13|| |
The Greates Common Factor (GCF) is: 11 x 13 = 143