No factors below 2^31
Prime95 v30.8 tested 3-PRP

PFGW result:
PFGW Version 4.1.3.64BIT.20240114.Win_Dev [GWNUM 30.19]

Primality testing 2^338917+561057 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
2^338917+561057 is PRP! (185.7766s+0.0005s)

Date Discovered: 2024.3.28

To be completed...