(932^20431-1)/931 is (probable) prime (found by Batalov), see
http://www.primenumbers.net/prptop/s...&action=Search
Fixed the text file, now 32 unknown terms at indices <= 1024:
{185, 269, 281, 380, 384, 385, 394, 396, 452, 465, 511, 574, 598, 601, 629, 631, 632, 636, 711, 713, 759, 771, 795, 861, 866, 881, 938, 948, 951, 956, 963, 1005, 1015}