Listed on Makoto Kamada s site: http://hpcgi2.nifty.com/m_kamada/f/phin10.cgi?p=521#P52028
Primality testing Phi(52028,10)/27314701/10882956901 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Generic modular reduction using generic reduction FFT length 8K on A 86352-bit number
Running N+1 test using discriminant 7, base 1+sqrt(7)
Generic modular reduction using generic reduction FFT length 8K on A 86352-bit number
Calling N-1 BLS with factored part 0.05% and helper 0.00% (0.15% proof)
Phi(52028,10)/27314701/10882956901 is Fermat and Lucas PRP! (815.6743s+0.0207s)
To be completed...