Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 105: | \[{31^{105}-1\over30}\] | 3 × 5 × 11 × 43 × 331 × 421 × 2521 × 6301 × 17351 × 319061 × 203633641 × 327412201 × 917087137 × 2813432694367<13> × 9240957640390889951861<22> × 39849234924648425393072876341<29> × 23707462166621201930562854073708336673561<41> |