WinPFGW 3.4.1:
2^187541-283 is 3-PRP! (43.5080s+0.0002s)
2^155702-401 is 3-PRP! (27.9990s+0.0019s)
2^157410-401 is 3-PRP! (28.2953s+0.0005s)
2^190922-401 is 3-PRP! (44.2083s+0.0005s)
2^174049-439 is 3-PRP! (40.3766s+0.0019s)
2^105372-467 is 3-PRP! (11.4577s+0.0019s)
2^158222-467 is 3-PRP! (28.7826s+0.0005s)
2^117033-543 is 3-PRP! (18.0945s+0.0005s)
2^121326-543 is 3-PRP! (18.7839s+0.0005s)
2^112765-553 is 3-PRP! (17.4422s+0.0005s)
2^141453-643 is 3-PRP! (25.8412s+0.0005s)
2^106684-659 is 3-PRP! (11.7699s+0.0005s)
2^103083-667 is 3-PRP! (11.3848s+0.0005s)
2^107451-667 is 3-PRP! (16.6061s+0.0005s)
2^160343-667 is 3-PRP! (37.5726s+0.0005s)
2^176255-667 is 3-PRP! (41.6665s+0.0006s)

To be completed...