updated my comment. The only thing I can think of is that discrete logs don't work that way. while E^(e.log_E(M)) == E mod n, e.log_E(M) doesn't equal 1. And

updated my comment. The only thing I can think of is that discrete logs don't work that way. while E^(e.log_E(M)) == E mod n, e.log_E(M) doesn't equal 1. And I'm not sure what /e means in the realm of exponents, besides *d, and I don't know how to find d without knowing M.