Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 406: | \[{5^{406}-1\over4}\] | 2 × 3 × 292 × 59 × 449 × 19531 × 35671 × 493291 × 5096867 × 6090817323763<13> × 22125996444329<14> × 23039208450560482164167<23> × 4978655062910170670969991331<28> × 104193411347291769738017451047<30> × 46071314775951042545073861671336487915817343677044617013083047061<65> × 870644868196664798437471040084684397998331787855406407455272073598393651325508166801<84> |