Greatest Common Factor of 1285 and 1289

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 1285, 1289 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1285 and 1289 is 1.

GCF(1285,1289) = 1

GCF of 1285 and 1289

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

Greatest Common Factor of 1285 and 1289

GCF of 1285 and 1289 is 1

Prime Factorization of 1285


5 1285
257 257
1

Prime factors of 1285 are 5,257. Prime factorization of 1285 in exponential form is:

1285 = 51×2571

Prime Factorization of 1289


1289 1289
1

Prime factors of 1289 are 1289. Prime factorization of 1289 in exponential form is:

1289 = 12891

∴ So by taking common prime factors GCF of 1285 and 1289 is 1

Greatest Common Factor of 1285 and 1289 by matching factors method

Factors of 1285

List of positive integer factors of 1285 that divides 1285 without a remainder.

1,5,257,1285

Factors of 1289

List of positive integer factors of 1289 that divides 1289 without a remainder.

1,1289

Greatest Common Factor

We found the factors and prime factorization of 1285 and 1289. The biggest common factor number is the GCF number.
So the greatest common factor 1285 and 1289 is 1.

Also check out the Least Common Multiple of 1285 and 1289

Properties of GCF 1285 and 1289

(i) The GCF of 1285 and 1289 is associative

GCF of 1285 and 1289 = GCF of 1289 and 1285

Related Greatest Common Factor of 1285

Related Greatest Common Factor of 1289

Frequently Asked Questions on GCF of 1285 and 1289

1. What is the GCF of 1285 and 1289?

Answer: GCF of 1285 and 1289 is 1.

2. What are the Factors of 1285?

Answer: Factors of 1285 are 1, 5, 257, 1285. There are 4 integers that are factors of 1285. The greatest factor of 1285 is 1285.

3. What are the Factors of 1289?

Answer: Factors of 1289 are 1, 1289. There are 2 integers that are factors of 1289. The greatest factor of 1289 is 1289.

4. How to Find the GCF of 1285 and 1289?

Answer:

Greatest Common Factor of 1285 and 1289 = 1

Step 1: Find the prime factorization of 1285

1285 = 5 x 257

Step 2: Find the prime factorization of 1289

1289 = 1289

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = = 1

Step 4: Therefore, the greatest common factor of 1285 and 1289 is 1