Notice whether the number is odd or even. If it's even, the first prime factor is 2.
The easiest way to notate the process of finding a prime factorization is a factor tree.
It is: 2*2*5*5 = 100
The prime factorization of 93 is 3 x 31. Draw it however you wish.
Writing the numbers down. If you've already done that, then find their prime factorizations.
first step in what!
The prime factorization of a number uses only primes. Ex: The prime factorization of 12 is not 6 x 2, and not 4 x 3, because 6 and 4 are not prime numbers. The prime factorization is 2 x 2 x 3. Their product is 12 and all factors are prime numbers. To get a prime factorization you are usually taught to factor through division by small prime numbers, sometimes you must use the same number more than once as in the example of 12 above 2 was used twice. Ex: find the prime factorization of 18. The smallest prime is 2... divide by 2 18 / 2 = 9 .... for the next step divide 9 by a prime 9 / 3 = 3 ... this is a prme ... it is also a factor so the prime factorization is 18 = 2x3x3 Ex. find the prime factorization of 35. 35 cannot be divided by 2, or 3, so use 5 first 35 / 5 = 7 .... since 7 is a prime we are finished. The prime factorization of 35 is 35 = 5 x 7 Some teachers teach this using a "factor tree" .. I can't type one of those on a computer.
If the first step is writing down the numbers, the second step is finding their prime factorizations.
yes its 3x5x5
75 25,3 5,5,3
75 25,3 5,5,3
2 ^ 1 2
It is: 2*2*5*5 = 100
The prime factorization of 93 is 3 x 31. Draw it however you wish.
Prime factorization of 46 is 2 X 23. We can do this easily by taking it one step at a time: First, 46 is an even number so we can divide it by 2. Since 2 is prime, it must be a prime factor! Now we have 23, which is a prime number. Double check: 2 * 23 = 46, and we're done!
1040 520,2 260,2,2 130,2,2,2 65,2,2,2,2 13,5,2,2,2,2
144 72,2 36,2,2 18,2,2,2 9,2,2,2,2 3,3,2,2,2,2
The first step in finding the factors of a number is to break it down into its prime factors. 55 is known from times tables to be 5x11, so we know its prime factorization is 5x11. To find any factors other than 1, you just multiply any combination of the prime factors together. In this case, 55 gives us the factors of: 1, 5, 11 and 55.
it is a way of finding out all of the prime numbers that you have to multiply to equal the desired number.