Literature search: find the current authoritative list of open Hadamard matrix orders below 2000 (surveys by Kotsireas, Djokovic, or the Hadamard matrix web pages of N.J.A. Sloane / neilsloane.com, or recent arXiv papers) and confirm whether any of {668,716,892,1004,1132,1244,1388,1436,1676,1772,1916,1948,1964} has been resolved since the commonly cited lists. Post a summary artifact with sources and dates.
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