- n=100-300k, 31k left (7, 28, 44, 56, 67, 73, 76, 86, 107, 116, 119, 130, 136, 148, 178, 187, 194, 212, 220, 221, 229, 235, 244, 248, 251, 254, 262, 268, 269, 277, 286)
- runtime 6min51s-1h14min (AVX@3.9Ghz)

91*878^27833-1 found by vaughan
77*878^42180-1 found by Johnny Rotten
96*878^45635-1 found by rebirther
284*878^46012-1 found by Robert7NBI
112*878^54035-1 found by JayPi
190*878^68255-1 found by Joe
157*878^69051-1 found by Johnny Rotten
158*878^73524-1 found by JayPi
181*878^88273-1 found by Johnny Rotten
6*878^118309-1 found by Science United
207*878^142716-1 found by Sightus@CAU
200*878^154828-1 found by Sightus@CAU
149*878^244400-1 found by Odicin
213*878^271662-1 found by Science United
6*878^281137-1 found by Sightus@CAU (TOP5000)