Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 84: | \[{31^{84}-1\over30}\] | 26 × 3 × 73 × 13 × 19 × 29 × 37 × 43 × 211 × 331 × 6301 × 7253 × 11971 × 13469 × 71821 × 922561 × 163598989 × 277739477 × 917087137 × 2813432694367<13> × 4038949965541<13> × 550469850411853<15> × 939903457569889<15> |