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To calculate manually if any number is a Prime number, divide the number by ascending prime numbers until you reach the square root of the number. In this instance:

123/2 = 61.5

123/3 = 41

Therefore, 123 is not a prime number. However, since the first two factors we discovered are both prime - those being 3 and 41, it must not have any other factors.

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โˆ™ 2010-08-23 09:13:33
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Factoring and Multiples

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Q: How do you find out if 123 is a prime number?
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Related questions

Is 123 a prime or composite number?

123 is not a prime number because it is divisible by 41 and 3. (123/41=3 and 123/3=41)A prime number is any number that is only divisible by two factors, one and itself.123 is a composite number because its factors are 1, 3, 41, and 123.


What is the prime factorization for the number 123?

3 x 41 = 123


Find the prime factorization of 123?

123 = 3 x 41


Which one of these is a prime number 234 788 123 563?

563 is the prime number.


What number goes into both 43 and 123?

Only the number 1 goes into both 43 & 123... because 43 is a prime number.


How many prime factorization does 123 have?

Each composite number has one distinct prime factorization. 3 x 41 = 123


Is 123 a composite or prime?

123 is a composite number because it has more than two factors


Is 123 prime or composite?

i is special number the 2 is composite number and 3 is composite


What is the prime factorization of 123?

The prime factors of 123 are 3 and 41. 3 x 41 = 123


Is 123 composite or prime?

123 is a composite number because it is divisible by 3. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1, 2, and 0. 1, 2, and 0 have a different name.


What is the number to find out your credit on orange?

123


What is divisable by 123?

well any multiple of 123 would be divisable by 123. Ex 123,246,369,492,615,738... but if your asking what 123 can be divided by its' 1 and itself, therefore making it a prime number 177


How do you write 123 as a product of prime factors?

123 written as a product of prime factors is: 123 = 3 X 41.


How do you find a fraction of a prime number?

Divide the prime number.


What 2 prime numbers make 123?

There is no pair of prime numbers that sum to 123.Proof :Any two odd primes will sum to an even number, thus excluding 123 which is odd.Since 2 is the only even prime, the only possible solution is 2 + 121 = 123.But, 121 is not prime because it is 11 x 11.A similar proof shows that there is no pair of primes whose difference is 123.There are two primes that multiply to 123 : - 3 and 41.


What is the prime factorization 123?

3 x 41 = 123


What is the prime fctor of 123 in a factor tree?

123 3,41


Is 123 a prime?

No as it is dividable by 3 (123/3=41)


What are the factors and prime factors of 123?

The 4 factors of 123 are 1, 3, 41, and 123.The factor pairs of 123 are 1 x 123 and 3 x 41.The proper factors of 123 are 1, 3, and 41 or,if the definition you are using excludes 1, they are 3 and 41.The prime factors of 123 are 3 and 41.The distinct prime factors of 123 are, since there is no repetition of prime factors, also 3 and 41.The prime factorization of 123 are 3 x 41.


What is the prime factorization of 123 in exponential form of 123?

123 = 31 x 411


What are the prime factors of 123?

The prime factors of 123 are 3 and 41.123 = 3 * 41


How do you find the least prime number?

2 is the least prime number.


Find the 3's complement of the number 123?

321


What is the prime factorization and factor tree of 123?

123 3,41 3 x 41 = 123


What prime numbers multiplied makes 123?

3*41 = 123.