Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 188: | \[{28^{188}-1\over27}\] | 5 × 29 × 157 × 6299 × 24128861 × 175323719489<12> × 21277176429749<14> × 1892292333735833<16> × 3425165712672937943<19> × 347263946374443738653441<24> × 6672276551574795883972235893<28> × 10794451258505794581848338245438995963581<41> × 75764711938856160324817699082756442359519489<44> × 27179675945975735069480752383214486901515169125648573078413581<62> |