Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 130: | \[{31^{130}-1\over30}\] | 25 × 5 × 11 × 41 × 131 × 521 × 911 × 1951 × 17351 × 17863 × 21821 × 42407 × 2426789 × 7908811 × 197271101 × 31035996941<11> × 42716694944587<14> × 5979236519649901<16> × 1129363636895809892086303692627113871721<40> × 29510535204545262157687088665468191183896988343413667225871<59> |