Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
123: | \[{5^{123}-1\over4}\] | 31 × 739 × 960139 × 1785961 × 2238236249 × 9025583299<10> × 5079304643216687969<19> × 5832474690386022428273180864659<31> |