19 isn't a factor of 68 and 34 isn't prime. Other than that... The largest prime factor of 68 is 17.
17
68 34,2 17,2,2
2)68 2)34 17)17 = 1 Hence '17' is the greatest prime number factor of '68'.
17 and 68 are not relatively prime because they have 17 as a common factor.
2 x 2 x 17 = 68
factor tree of 68:(68) = 2 * (34)(34) = 2 * 17so prime factors are 2 * 2 * 17
No.
68 34,2 17,2,2 2 x 2 x 17 = 68
No. 1 is not their only common factor. 17 is actually a factor of 68, so they have 1 and 17 as common factors.
68 = 2 * 2 * 17 17 + 2 = 19
2^2 x 17 = 68