Prime95: PRP-3
pfgw: Fermat and Lucas PRP
Any 10^(4966k+88)+7 is divisible by 4967, 188796 = 38*4966+88
Any 10^(17983k+8966)+7 is divisible by 71933, 188796 = 10*17983+8966
Any 10^(89303578k+188796)+7 is divisible by 4967*71933

To be completed...