Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 93: | \[{28^{93}-1\over27}\] | 3 × 271 × 373 × 1117 × 10789 × 1675799 × 14307617 × 104175305182941687128096479<27> × 9751283154942605850592828466642659513447<40> × 160281583784620677280319713020603382697107<42> |