>>16730308 (OP)In 1977, researcher J. Michael Bedford discovered that human sperm could penetrate the protective outer membranes of a gibbon egg. Bedford's paper also stated that human spermatozoa would not even attach to the zona surface of non-hominoid primates (baboon, rhesus monkey, and squirrel monkey), concluding that although the specificity of human spermatozoa is not confined to Homo sapiens sapiens alone, it is probably restricted to the Hominoidea. However, in the opposite direction of closely related species, it has been found that human sperm binds to gorilla oocytes with almost the same ease as to human ones.
We don't have any proof that there was a hybrid created, but I doubt that we the public would be informed if it did happen. We do know that Homo sapien mixed with other members of homo such as the neanderthals and denisovans.