Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 164: | \[{28^{164}-1\over27}\] | 5 × 29 × 83 × 157 × 821 × 801469 × 2008673 × 32512427 × 9048878843<10> × 164175956442953113<18> × 5002383217719389360473913384039<31> × 4495294535482012470972518309284152114589<40> × 12903372235376872347241937999231008831884805129840357<53> × 2282845107988936222774899630243924800305888231463977150781<58> |