PRIME FACTORS OF:56, 67, 72, 85, 92
PRIME FACTORIZATION OF:49, 38, 76, 60, 81, 132, 140, 87
2007-10-22 14:19:24 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Prime means a number that has two factors, 1 and itself.
A prime factorization is the longest string of factors.
Figure it out yourself. Sorry, its pretty simple but I really dont want to do your homework.
2007-10-22 14:42:27 · answer #1 · answered by ○•Picasso•○ 5 · 1⤊ 1⤋
Some hints:
If something ends in an even digit, there's a factor of 2.
If something's digits add to a multiple of 3, there's a factor of 3.
If something ends in 5, there's a factor of 5.
If something ends in a 0, there are factors of both 2 and 5.
If n is NOT prime, then at least one of its prime factors p has p^2 less than or equal to n. Thus, for all numbers less than 13^2 = 169, if they're not divisible by 2, 3, 5, 7, or 11, they're prime. And 7 is the only hard one to check.
2007-10-22 20:58:05 · answer #2 · answered by Curt Monash 7 · 0⤊ 0⤋