Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 147: | \[{7^{147}-1\over6}\] | 3 × 19 × 29 × 3529 × 4733 × 1074473 × 13473433 × 11898664849<11> × 4060603391041<13> × 6106505825833677713<19> × 424770871339903301567509<24> × 56427334222486513688076273080920621<35> |