Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 124: | \[{28^{124}-1\over27}\] | 5 × 29 × 157 × 1303 × 10789 × 17981 × 1675799 × 14307617 × 32660609 × 68690971367<11> × 41183608552636142233<20> × 104175305182941687128096479<27> × 280321817417013527271954418037<30> × 27884686722505100360091725592256555804932742636659265933<56> |