The method of sieving the multiples of prime numbers until only the prime numbers remain, while attributed to Eratosthenes, is originally thought to have been the work of Nicomachus.
The factors of 12 are: 1,2,3,4,6. The prime factors are the prime numbers in the factors. So: 1,2,3 are the prime factors of 12.
61 and 73 are prime numbers. Prime numbers don't have prime factorizations, since their only prime factors are themselves. Since these would have to be different numbers, they don't have any prime factors in common. The GCF of any set of prime numbers is 1.
It is the same as finding the LCM of two numbers that have been expressed as a product of their prime factors except that you need to use the highest index for each prime factor.
Among other things, a knowledge about prime numbers and factoring can help you in finding least common multiples and greatest common factors.
Multiply prime numbers or prime factors to find their product.
2 x 2 x 3 x 7 = 84
where is it
As a product of its prime numbers: 3*7*11 = 231
There is no work. The only prime number ending in 5 is 5.