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To get the Greates Common Factor (GCF) of 1005 and 266 we need to factor each value first and then we choose all the copies of factors and multiply them:
|1005: || ||3||5|| || ||67|
|266: ||2|| || ||7||19|| |
|GCF: || || || || || || |
The Greates Common Factor (GCF) is: 1