Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 282: | \[{31^{282}-1\over30}\] | 25 × 3 × 72 × 19 × 283 × 331 × 659 × 1693 × 20681 × 36943 × 507883 × 322825141 × 3128573142495569<16> × 433010935358974054681<21> × 46498537840556983960843<23> × 47932062894369771872977<23> × 170942984502845969696543<24> × 773892718948740289245597142031<30> × 40212500195692026483824851508412206472937<41> × 88191216508702589699784765539165129720664028300782169<53> × 616167879525642360312211084179957260172237705343394621983977724819<66> × 119601291432976474939014292378960373786610025808376614886591088073614361342546538750787<87> |