65? I don't know off-hand, but to raise them, you 'll need to raise WIS. 7 WIS = 1 Resist point across the board of resists. So, it will be vary hard to max them out that way.
Everyone starts with 40 base resists, plus the wis bonus. So it would be (wis/7)+40. I made a thread a few weeks ago and I was adding up resist bases to see what I could get, might help some maybe not.