Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 79: | \[{5^{79}-1\over4}\] | 205367807127911<15> × 58523123221688392679<20> × 344120456368919234899<21> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 79: | \[{5^{79}-1\over4}\] | 205367807127911<15> × 58523123221688392679<20> × 344120456368919234899<21> |