Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 245: | \[{5^{245}-1\over4}\] | 11 × 71 × 211 × 491 × 631 × 4201 × 8821 × 10781 × 19531 × 85280581 × 16650328910366149531471<23> × 227376585863531112677002031251<30> × 3129890246814727420720419358593888931<37> × 1098360442691511496324435051973573719721299106911<49> |