Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 153: | \[{28^{153}-1\over27}\] | 32 × 192 × 103 × 271 × 307 × 57427 × 444979 × 8061059901399457<16> × 366725909655733758769<21> × 148020807352107352204781<24> × 412037760199357579738273<24> × 1707336094899200333664552684944445714046121929<46> × 43989824843071700647170257890026209782005238360922199184470570136204243<71> |