5^188558+4 is 3-PRP! (36.2683s+0.0014s)
5^188558+4 is 5-PRP! (36.2385s+0.0015s)
5^188558+4 is 7-PRP! (36.1284s+0.0014s)
5^188558+4 is 9-PRP! (36.0857s+0.0014s)
5^188558+4 is 11-PRP! (36.0488s+0.0020s)
5^188558+4 is 13-PRP! (36.2874s+0.0014s)
5^188558+4 is 15-PRP! (38.9611s+0.0014s)

Tested using pfgw64.exe

To be completed...