2335667

This number is a prime.

The smallest prime that remains prime for d = {1, 2, 3, 4, 5, 6} in 2d3d3d5d6d6d7, e.g., 2131315161617, 2232325262627, 2333335363637, 2434345464647, 2535355565657, 2636365666667. [Bajpai]