You have computed about 2^58.36 steps. And you know now the private keys of 2^33.36 DPs in the [1, 2^114 - 1] interval (why you said [2^114,2^115-1]? you know only one public key P in [2^114, 2^115 - 1] range, all the public keys/points you have computed lie in [1, 2^114 - 1])