Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 230: | \[{28^{230}-1\over27}\] | 11 × 29 × 47 × 53951 × 567871 × 637421 × 115152031 × 322158931 × 9222651551<10> × 140668620541<12> × 4002150181261<13> × 4099849287367<13> × 1517655145813456319033978812579<31> × 1344840641680376608506117263739531145118237262742589311<55> × 87724686473407045984586880506193799815093321469457009158951<59> × 628054768559786891757611655893030548059510900279050448005404526792806366575408300744932629764072522920591<105> |