67, 71, 73
65, 77, 78 and 315
The prime numbers between 42 and 78 are 43, 47, 53, 59, 61, 67, 71, and 73.
65, 70 and 75
65, 70, 75
78
2x3x13=78
Well, honey, the greatest common factor of 91, 78, and 65 is 13. It's like finding the biggest slice of cake that all three numbers can share without any leftovers. So, go ahead and divide those numbers by 13 and make sure everyone gets their fair share.
I assume you mean prime factors. 78 = 2*3*13
65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80
19+59 = 78
466uo
2, 3 and 13 are the only prime numbers that combine to make 78.