Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 86: | \[{5^{86}-1\over4}\] | 2 × 3 × 1549 × 9547 × 1644512641 × 7866608083<10> × 1628744948329<13> × 172827552198815888791<21> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 86: | \[{5^{86}-1\over4}\] | 2 × 3 × 1549 × 9547 × 1644512641 × 7866608083<10> × 1628744948329<13> × 172827552198815888791<21> |