Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 251: | \[{16^{251}-1\over15}\] | 503 × 5021 × 54217 × 238451 × 1912621 × 57762875981<11> × 1972386557777<13> × 38508212572597<14> × 178230287214063289511<21> × 61676882198695257501367<23> × 12070396178249893039969681<26> × 45063180240128066017730357<26> × 86245368961389419078481015822433<32> × 15992518154179475674328213556857438690614816129<47> × 5058345723951854688505665428846313806490903121677364358901199128608233<70> |