Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
78: | \[{31^{78}-1\over30}\] | 25 × 3 × 72 × 19 × 792 × 157 × 331 × 13807 × 17863 × 39703 × 42407 × 238213 × 2426789 × 7908811 × 42716694944587<14> × 175500339130677572941801<24> × 17123370267331917425544180721<29> |