Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 231: | \[{5^{231}-1\over4}\] | 31 × 199 × 379 × 19531 × 519499 × 12207031 × 527093491 × 13920748381<11> × 386478495679<12> × 8090594434231<13> × 162715052426691233701<21> × 267859557529209897722406319386619<33> × 250176727235862117504718715345525839542079<42> |