Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
167: | \[{5^{167}-1\over4}\] | 18371 × 53441 × 136120444765766549215152778976644223266629687067883561040373326929809178107924810841979832452900690680385721<108> |