Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 248: | \[{28^{248}-1\over27}\] | 5 × 29 × 157 × 1303 × 10789 × 17981 × 614657 × 1675799 × 9264041 × 14307617 × 32660609 × 187470641 × 5169432529<10> × 68690971367<11> × 41183608552636142233<20> × 104175305182941687128096479<27> × 280321817417013527271954418037<30> × 86548101993906356734139321964429422523637841<44> × 1592340800012622170002135801379339422838859913<46> × 27884686722505100360091725592256555804932742636659265933<56> × 368546998982636300658549673875707774050955110987978355647553<60> |