Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 164: | \[{5^{164}-1\over4}\] | 22 × 3 × 13 × 83 × 43543 × 193357 × 221401 × 6355001 × 2238236249 × 1148205782281<13> × 9472026608675509<16> × 5079304643216687969<19> × 56373078952722628530598981268453<32> |