Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 105: | \[{28^{105}-1\over27}\] | 3 × 31 × 113 × 271 × 421 × 2521 × 15991 × 206501 × 637421 × 734941 × 4422461 × 6313861 × 223934956756993189<18> × 99885743242098024883367081<26> × 98336245890572745925217555761<29> × 11536371289790796513662140395301<32> |