Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 216: | \[{5^{216}-1\over4}\] | 23 × 34 × 7 × 13 × 19 × 31 × 37 × 73 × 109 × 163 × 271 × 313 × 487 × 601 × 829 × 4159 × 5167 × 31051 × 73009 × 390001 × 543097 × 1853281 × 3314953 × 6597973 × 16018507 × 1503418321 × 36280398313<11> × 13012873776055827785521<23> × 14551915228363037109375001<26> |