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To get the Greates Common Factor (GCF) of 1785 and 12749 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1785: ||3||5||7|| ||17|| || |
|12749: || || || ||11|| ||19||61|
|GCF: || || || || || || || |
The Greates Common Factor (GCF) is: 1