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Shorter factor strings aren't composed entirely of prime numbers.
It varies with each given number.
It is a square of that factor. E.g. 5 is a distinct factor of 25. If you multiply that distinct factor by itself (5*5) you get 25. A square comes from the x^2 notation and is any number which has a factor which is multiplied by itself.
The longest factor string of any composite number is its prime factorization.
5 x 5
The longest factor string is 2x2x2x3x13. It is always best to list your factor string from the least to greatest number.
Well, honey, in the number 840, there are 4 longest strings: "8", "4", and two "0"s. Looks like you hit the jackpot with those long strings, but don't get too excited - they're just numbers, after all.
For composite numbers, only one string of factors is the longest; the prime factorization.
The prime factorization
the longest factor string for 840 is: 2x2x2x3x5x7. I hoped that helped m! Have a good rest of your day!
No, 12 is not a prime number.
10 of them.