Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 78: | \[{5^{78}-1\over4}\] | 2 × 32 × 7 × 31 × 79 × 3121 × 5227 × 38923 × 305175781 × 22735632934561<14> × 608459012088799<15> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 78: | \[{5^{78}-1\over4}\] | 2 × 32 × 7 × 31 × 79 × 3121 × 5227 × 38923 × 305175781 × 22735632934561<14> × 608459012088799<15> |