Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 426: | \[{5^{426}-1\over4}\] | 2 × 32 × 7 × 31 × 569 × 4261 × 156309592445437909<18> × 5747338499820296170481<22> × 288231038713838413442281<24> × 2893657379733917265396310772669592883<37> × 18607929421228039083223253529869111644362732899<47> × 29517135796279606458249021809310932933544054168008265017565907<62> × 370163242821653845863570763914660810458665023659282594126568842526686335908781669<81> |