WinPFGW 3.6.5:
2^193375-295 is 3-PRP! (45.7167s+0.0018s)
2^154383-637 is 3-PRP! (28.4571s+0.0001s)
2^126449-1693 is 3-PRP! (23.3169s+0.0002s)
2^348612-809 is 3-PRP! (157.3450s+0.0020s)
2^291467-937 is 3-PRP! (110.1730s+0.0020s)

To be completed...