Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
65: | 5 × 11 × 911 × 1951 × 17351 × 42407 × 2426789 × 7908811 × 31035996941<11> × 5979236519649901<16> × 1129363636895809892086303692627113871721<40> |