Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 399: | \[{18^{399}-1\over17}\] | 74 × 449 × 6841 × 80207 × 204023 × 22647241 × 49070090119<11> × 1288363483639<13> × 156107192084257<15> × 651901577254926769<18> × 6089884909802812423<19> × 3522349102008270555071<22> × 18475258196790363455557729<26> × 10896496922400499045359426950353<32> × 1135070056132121343004681823047441<34> × 4387966312585055506457903642949218117592894048635384330976913719069934194657675119164757257<91> × [111058233843400544230504982675643427298603493306691239516094484744064916854101669416815781993195521224053887861602140905115921503562407537111026665838376098295318875423634658120010534004998186550967<198>] |