This number is a prime.
The smallest Cyclops prime that remains Cyclops prime for D = 1, 3, 5, 7, 9 in 1D7D9D0D5D3D1. [Gupta]
The smallest Cyclops prime that remains Cyclops prime for D
= 1, 3, 5, 7, 9 in 1D7D9D0D5D3D1. [Gupta]