Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 639: | \[{5^{639}-1\over4}\] | 19 × 31 × 569 × 829 × 1279 × 12781 × 156309592445437909<18> × 492219549951779195191<21> × 18607929421228039083223253529869111644362732899<47> × 370163242821653845863570763914660810458665023659282594126568842526686335908781669<81> × 45532288329309628206827018519621387574463982037850216289983548373195074510122177911463143114592140532757714105326046335682548825397341385288660924986703083969341636359842728309334351711565565017142758698321615598568513350012346738466327218617249599227327371211339189<266> |