Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
50: | \[{13^{50}-1\over12}\] | 2 × 7 × 11 × 101 × 701 × 2411 × 9851 × 30941 × 57751 × 2752135920929651<16> × 3258254426373251<16> |