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If they have no prime factors in common, their GCF is 1.

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Q: How can you find the gcf of two numbers is 1by looking at their prime factorazations?
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How can you find the GCF of a given set of numbers given their LCM but without listing the factors of the numbers?

By finding their common prime numbers.


How does finding the prime factorization of a group of numbers help you to find their greatest common factor?

If you take all the common prime factors between numbers and multiply them it will give you the gcf.


What is the greates common factor of the numbers 155 using prime factorization?

You need at least two numbers to find a GCF.


Least common multiple for 7 and 17?

7 and 17 are both primes numbers. The means that to find the LCM we need multiply them. The LCM of 7 and 17 is 7x17 which is 119. If two numbers are prime, then they are also relatively prime and in general the way to find the LCM of relatively prime number is to multiply them together.


How do you find the LCM of a composite number?

You need at least two numbers to find an LCM. It doesn't matter whether they are prime or composite.

Related questions

What is this find two prime numbers whose different is 1Is there another pair?

If you are looking for two prime numbers whose difference is 1, then the numbers have to be 1 & 3.


What is the total of the next eight prime numbers after twenty four?

Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.Just go to a table of prime numbers, find the prime numbers, and add them.


How can prime numbers be used in your everyday life?

Prime numbers are used to find the LCM of numbers Prime numbers are used to find the HCF of numbers Prime numbers are used to simplify fractions Prime numbers are used to find the LCD of fractions


Which prime numbers can be mulitiplied to form?

Prime numbers are used to find the product of the prime factors of composite numbers.


How can you do prime factorization with prime numbers?

There is no need to do prime factorization as prime numbers are already prime. You do not need to find the prime numbers that when multiplied together create the number.


What type of numbers can you multiply to always find the LCM?

prime numbers, co-prime numbers


How do you find out which one are the prime numbers?

Prime numbers have only two factors.


Who ave the method of finding out prime numbers?

Nobody. That is because there is no pattern to prime numbers. There are various methods to find some classes of prime numbers but none that will find all of them.


How do you find out how numbers are relatively prime?

Two numbers are relatively prime if their GCF is 1.


Prime numbers between 180-220?

For this kind of question, I would suggest looking up a table of prime numbers. As an alternative, you can try to find factors for each of the numbers - if it has a factor, it is NOT a prime. For this range of numbers, testing for prime numbers up to 13 is appropriate. (If 17 is a factor of one of these numbers, the other factor is less than 17, so you would already have found it before you reach 17.)


How do you calculate the sum of first 20 prime number?

You find the first 20 prime numbers and add them together. There is no formula for generating a sequence of prime numbers and so none for the series of their sums.You find the first 20 prime numbers and add them together. There is no formula for generating a sequence of prime numbers and so none for the series of their sums.You find the first 20 prime numbers and add them together. There is no formula for generating a sequence of prime numbers and so none for the series of their sums.You find the first 20 prime numbers and add them together. There is no formula for generating a sequence of prime numbers and so none for the series of their sums.


Can you find the LCM of a prime number?

No. You can only find the LCM of at least two numbers, prime or otherwise. The LCM of any two prime numbers is their product.