# Calculate the Greatest Common Factor or GCF of 1261

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The instructions to find the GCF of 1261 are the next:

## 1. Decompose all numbers into prime factors

1261 | 13 |

97 | 97 |

1 |

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

Prime factors of 1261 | = | 13 . 97 |

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

Common prime factors: 13 , 97

Common prime factors with the lowest exponent: 13^{1}, 97^{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** = 13^{1}. 97^{1} = 1261

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