What's the greatest number of faithless electors that the US experienced in a single US election?

What was the greatest number of faithless electors that the US experienced in voting for President in any historical election for the modern era (FDR--to present)? And how many faithless electors would Hillary Clinton need to win given she wins New Hampshire and Donald Trumps has already won Michigan?

• there is a list of all faithless electors on wikipedia: en.wikipedia.org/wiki/… Nov 13 '16 at 20:30
• Well, it looks like the answer to the first question is 63 or 32, and the answer to the second question is clearly 38 (228 + 4 + 38 = 270). So the net answer is either plenty or almost, depending on how one wants to treat the Greeley example. The modern era makes the opposite point though. Never more than 1 a year, while still needing 38. Nov 13 '16 at 21:51
• thanks Brythan. If you could put that in an answer I would have awarded it the winning one.
– user9790
Nov 13 '16 at 21:56
• Two questions in one. First question is simply history and can be looked up. Second one is a bit of speculation until the outcome of all the states is known, then reduces to a simple matter of calculation.
– SQB
Nov 14 '16 at 13:28