Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
219: | \[{6^{219}-1\over5}\] | 43 × 1143619 × 44764549877<11> × 2436094907761<13> × 8439148071138817<16> × 138721648424756087<18> × 2820121693645487997956892799666256974847683<43> × 2938088606095421167185780675090427740332239357953057651820512043<64> |