Base 23 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 405: | \[{23^{405}-1\over22}\] | 7 × 19 × 79 × 541 × 4591 × 292561 × 7792003 × 14945797 × 15785281 × 833155201 × 74912328481<11> × 44765293701223<14> × 1561805791124851<16> × 59679899512256809<17> × 1088774249552970415950511<25> × 35157512647661402580746419<26> × 480211292412647894626919619228001<33> × 157345377804336590489205615404573512329497788733310403629743191034571031<72> × [1358978480783035781129166464464209180399870418260614224964496251431076432159222498078341557393601958101608771144356855180453921881127326836843441856727562884619416691696054744927406382906765163687971073018863238639550924393162777268216596472688901197996153874563435058448638713517116875259362401<295>] |