Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 147: | \[{31^{147}-1\over30}\] | 3 × 43 × 331 × 883 × 6301 × 6959 × 917087137 × 2813432694367<13> × 6585932048863895071<19> × 62322419393153627851729037464684263699383389269055382039663<59> × 32344789788649327732696376664576672818997374042616085583943679006635374376810685575124017857915274291877<104> |