WinPFGW 3.6.5:
2^40416-2337 is 3-PRP! (2.0743s+0.0007s)
2^55340-2337 is 3-PRP! (4.4004s+0.0007s)
2^64578-2337 is 3-PRP! (5.8000s+0.0007s)
2^71952-2337 is 3-PRP! (8.0813s+0.0007s)
2^74788-2337 is 3-PRP! (8.4461s+0.0007s)
2^80220-2337 is 3-PRP! (9.0040s+0.0007s)
2^99458-2337 is 3-PRP! (15.6057s+0.0007s)
2^52564-2339 is 3-PRP! (4.1962s+0.0007s)
2^70724-2339 is 3-PRP! (6.3292s+0.0007s)

To be completed...