# Calculate the Greatest Common Factor or GCF of 1340

Sponsors

The instructions to find the GCF of 1340 are the next:

## 1. Decompose all numbers into prime factors

1340 | 2 |

670 | 2 |

335 | 5 |

67 | 67 |

1 |

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

Prime factors of 1340 | = | 2^{2} . 5 . 67 |

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

Common prime factors: 2 , 5 , 67

Common prime factors with the lowest exponent: 2^{2}, 5^{1}, 67^{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^{2}. 5^{1}. 67^{1} = 1340

Also calculates the: