2 x 3 x 7 = 42
15 is not a prime number, so it can't be a prime factor.
I suggest you try to factor that, then sort the factors in ascending order. Then you can subtract the two largest factors. ------------------------------------ The prime fractorization of 33660 is 2² × 3² × 5 × 11 × 17. The two greatest prime factors are 11 and 17, so their difference is 17 - 11 = 6.
The Prime Factors of 15 are 3, 5
Factors of 15 are: 1 3 5 and 15 of which 3 and 5 are prime factors
23x19
13,2,4,7,3,1,8,358,24,27,792,45,89,32 and 97.
152 = 2x2x2x19.2,2,2,19
The answer is 2x5x2 3
2*5*19
1, 2 and 13
3*3*7
17*17 = 289
49 = 7*7
The prime factorization of 39 is: 13 * 3 *1
The prime factorization of 88 is 2*2*2*11.
45 = 3² x 5