WinPFGW 3.6.5:
2^91766-3251 is 3-PRP! (4.7185s+0.0001s)
2^77021-3253 is 3-PRP! (3.1260s+0.0001s)
2^66519-3255 is 3-PRP! (1.9945s+0.0001s)
2^76303-3255 is 3-PRP! (3.0829s+0.0001s)
2^86042-3255 is 3-PRP! (3.4711s+0.0001s)
2^94470-3255 is 3-PRP! (4.8535s+0.0001s)
2^95967-3255 is 3-PRP! (4.9267s+0.0001s)
2^89708-3257 is 3-PRP! (3.6166s+0.0001s)
2^69279-3259 is 3-PRP! (2.7985s+0.0001s)
2^94369-3261 is 3-PRP! (4.8417s+0.0001s)
2^68474-3263 is 3-PRP! (2.0582s+0.0001s)
2^87550-3263 is 3-PRP! (3.5308s+0.0001s)
2^74983-3265 is 3-PRP! (3.0500s+0.0001s)
2^91743-3267 is 3-PRP! (4.7429s+0.0001s)
2^99646-3281 is 3-PRP! (5.1176s+0.0001s)
2^88749-3283 is 3-PRP! (3.6270s+0.0001s)
2^95021-3283 is 3-PRP! (4.8968s+0.0001s)
2^67093-3289 is 3-PRP! (2.0467s+0.0001s)
2^68633-3291 is 3-PRP! (2.0625s+0.0001s)
2^89042-3291 is 3-PRP! (3.5877s+0.0001s)
2^99403-3291 is 3-PRP! (5.1134s+0.0002s)
2^71034-3293 is 3-PRP! (2.8663s+0.0001s)
2^75719-3297 is 3-PRP! (3.0749s+0.0001s)

To be completed...