Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
178: | \[{13^{178}-1\over12}\] | 2 × 7 × 179 × 9257 × 21001153 × 2197020880176009487<19> × 410771620528283009753757952793<30> × 716164560927079240026189379811<30> × 5213778357457568130608412722105028066526967<43> × 97149593605438945916118967283170626506454157662777835870622857<62> |