Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 427: | \[{5^{427}-1\over4}\] | 4271 × 8419 × 19531 × 918585913061<12> × 140194179307171898833699259<27> × 18978978300104368967581806916192652565860081<44> × 7542716440988220524637259849798856565032358594793351250565694550807389<70> × 557143316434990549426124166172252315988635111962748701272517051609259161678627148019360812941633602572608697939823077603694320020152539<135> |