Phi(852060,10)L listed on Makoto Kamada s site: http://stdkmd.com/nrr/repunit/prpfactors.htm

Listed on Markus Tervooren s site: http://factordb.com/index.php?id=1100000000774861139

PFGW Version 3.7.9.64BIT.20141125.Win_Dev [GWNUM 28.6]
Generic modular reduction using generic reduction type-1 FFT length 40K, Pass1=32, Pass2=1280 on A 342825-bit number
gcd(Phi(852060,10),(10^42603+1)^3*(10^42603+1-10^21302)+(10^85206+10^42603)*(10^21302+1)+10^127809) is 3-PRP! (605.4539s+1.5881s)

To be completed...