if I go on my dads car insurance will it be cheaper?

[neverending45]

I am 17 going for my license sat I know I am going to get it and I am buying a car sun, my question is if my car goes on my dads unsurance and I am a primary driver will it be less money then if I go on my own I ot a quote on my own and it was 341 dollars a month or 3100 every 6months... and is 684 a good credit score