Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 156: | \[{31^{156}-1\over30}\] | 26 × 3 × 72 × 132 × 19 × 37 × 53 × 792 × 157 × 331 × 13807 × 17863 × 39703 × 42407 × 238213 × 922561 × 2426789 × 7908811 × 116337521 × 76037563733<11> × 141336778441<12> × 42716694944587<14> × 101686136508893<15> × 175500339130677572941801<24> × 17123370267331917425544180721<29> × 2726200542741119966575177261557485131084188663722754554972281<61> |