Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 531: | \[{31^{531}-1\over30}\] | 32 × 331 × 3637 × 6373 × 81343 × 1816729 × 8177401 × 499215049 × 19216744507<11> × 468099896569<12> × 5587992961609<13> × 46394158270152673<17> × 125693727758648407613<21> × 2593612406801473161066888689957754830054017617439929433838873336053<67> × 779110751002944931593880043551085194284419728286833281326930138887871379729715331740337603229935558050987115088080529709237<123> × [1105889565211923285566343468655916880421299943398732460861558901863936113794288483875443878103377469428217528010676330762185403947387283867300498509235247049357707255045332494055353539184113925651901990283290580428560681548180501562727466089567706229345726627575690887886923371009563829011384299084923080359758476218703561158412839617771623891247798932989709535071913837063129995177877433803499337399601257002482711552794830797115877733097543945865239581492928951957253805592658035645352417811<493>] |