Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 238: | \[{28^{238}-1\over27}\] | 29 × 113 × 239 × 613 × 953 × 1429 × 2347 × 2381 × 8807 × 13007 × 35771 × 204443 × 336533 × 371281 × 4422461 × 47658073 × 865411793 × 45508138747<11> × 274617072311<12> × 144580610814949<15> × 1676112251373701<16> × 44211612789526421<17> × 160213861129312229<18> × 176991400091091853<18> × 653386914001297841<18> × 21577998627933032027<20> × 148020807352107352204781<24> × 9208413547092739531146589<25> × 156360521144213633542055069<27> × 12342935569678652043560583251108331026192906707175504503<56> |