Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 189: | \[{28^{189}-1\over27}\] | 33 × 192 × 113 × 271 × 541 × 1009 × 12097 × 47629 × 444979 × 4422461 × 223934956756993189<18> × 10773834771944357821<20> × 68948693997660959163751<23> × 154154940307497300453157<24> × 80504606285644335564853693<26> × 56004645287020645451504447700757281923034575091149549601193<59> × 5648379643356687577049857275517918462211061661174665173561404034393281<70> |