Listed on Makoto Kamada s site: http://hpcgi2.nifty.com/m_kamada/f/phin10.cgi?p=521#P52066
Primality testing Phi(52066,10)/312397/2499169/1057304263 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Generic modular reduction using generic reduction FFT length 7K on A 74037-bit number
Running N+1 test using discriminant 29, base 11+sqrt(29)
Generic modular reduction using generic reduction FFT length 7K on A 74037-bit number
Calling N+1 BLS with factored part 0.04% and helper 0.04% (0.17% proof)
Phi(52066,10)/312397/2499169/1057304263 is Fermat and Lucas PRP! (500.2976s+0.0270s)
To be completed...