Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 299: | \[{20^{299}-1\over19}\] | 599 × 691 × 1381 × 3121 × 14951 × 142559 × 9690539 × 44100109 × 10189961657279<14> × 135774587238620214509<21> × 46266279097921483078651<23> × 51536472921386180593324960858380311296271706952731532996741654984721098110942962064070786774704434550194796099688923998381859187192390660649752291814915675580246273761564976032401249618670887472055093994488807112534103375695113476673473706115786754414091278503563270136310181659829149286567006331<296> |