Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 168: | \[{31^{168}-1\over30}\] | 27 × 3 × 73 × 13 × 19 × 29 × 37 × 43 × 113 × 211 × 331 × 409 × 1129 × 6301 × 7253 × 11971 × 13469 × 71821 × 922561 × 163598989 × 277739477 × 337886977 × 917087137 × 852890113921<12> × 2813432694367<13> × 4038949965541<13> × 36004683284137<14> × 550469850411853<15> × 939903457569889<15> × 152490484148901066281<21> × 1139174673410619194105634164045563117625339372157650642879811073<64> |