While using google to search for "11th power diophantine" it gave the mathoverflow link,
which is copied word-for-word from my mathstackexchange post,
While I'm glad it generated some fruitful discussion in this forum, the least the poster (fermatII) could have done was cite that he/she found the question elsewhere, and not copy it word-for-word.
(Looking at his/her profile, it seems this was the only question he/she asked. Perhaps stranger things have happened in this forum?)