WinPFGW 3.7.10:
2^272826-4433 is 3-PRP! (47.4099s+0.0008s)
2^300790-4541 is 3-PRP! (53.2262s+0.0012s)
2^250369-4543 is 3-PRP! (33.2377s+0.0008s)
2^339081-4543 is 3-PRP! (72.1259s+0.0009s)
2^376549-4543 is 3-PRP! (82.0537s+0.0013s)
2^214300-4547 is 3-PRP! (26.9009s+0.0001s)
2^357930-4547 is 3-PRP! (78.0068s+0.0008s)
2^360468-4559 is 3-PRP! (77.8863s+0.0008s)
2^332277-4573 is 3-PRP! (58.9167s+0.0012s)
2^200191-4597 is 3-PRP! (22.8678s+0.0002s)
2^269819-4597 is 3-PRP! (45.2034s+0.0011s)

To be completed...