Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 174: | \[{28^{174}-1\over27}\] | 3 × 292 × 59 × 271 × 757 × 40427 × 1074509 × 77241733 × 5506203727<10> × 25404189355843522469778697943<29> × 78986076594620414501936740817451437263<38> × 582595509837473004489665028935473297399<39> × 14405203448381389905975938245958580648196627<44> × 2490984281800796713523237526645659080993083834467855653648162831<64> |