Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 188: | \[{31^{188}-1\over30}\] | 26 × 13 × 37 × 659 × 20681 × 1094161 × 322825141 × 12560739661<11> × 773431790375113<15> × 3128573142495569<16> × 5546061664670771593<19> × 170942984502845969696543<24> × 773892718948740289245597142031<30> × 88191216508702589699784765539165129720664028300782169<53> × 2718447751333995349337539287262774938878638067595160366026609815885117835327137958283429<88> |