Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 104: | \[{31^{104}-1\over30}\] | 27 × 132 × 37 × 53 × 409 × 1129 × 17863 × 42407 × 2426789 × 7908811 × 116337521 × 76037563733<11> × 42716694944587<14> × 101686136508893<15> × 305688893141113<15> × 5603212901768856193<19> × 224721202412918666334576819250523191369<39> |