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

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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.

3 x 41 = 123

123 = 3 x 41

563 is the prime number.

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

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

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

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

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

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.

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

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

Divide the prime number.

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.

3 x 41 = 123

123 3,41

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

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.

123 = 31 x 411

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

2 is the least prime number.

321

123 3,41 3 x 41 = 123

3*41 = 123.