Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 154: | \[{5^{154}-1\over4}\] | 2 × 3 × 23 × 29 × 67 × 449 × 5281 × 19531 × 12207031 × 527093491 × 20828886541<11> × 8090594434231<13> × 162715052426691233701<21> × 49970061516036179615325895945741<32> |