# Calculate the Greatest Common Factor or GCF of 1288

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The instructions to find the GCF of 1288 are the next:

## 1. Decompose all numbers into prime factors

1288 | 2 |

644 | 2 |

322 | 2 |

161 | 7 |

23 | 23 |

1 |

## 2. Write all numbers as the product of its prime factors

Prime factors of 1288 | = | 2^{3} . 7 . 23 |

## 3. Choose the common prime factors with the lowest exponent

Common prime factors: 2 , 7 , 23

Common prime factors with the lowest exponent: 2^{3}, 7^{1}, 23^{1}

## 4. Calculate the Greatest Common Factor or GCF

Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.

**GCF** = 2^{3}. 7^{1}. 23^{1} = 1288

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