Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 279: | \[{31^{279}-1\over30}\] | 32 × 331 × 1117 × 3637 × 45757 × 81343 × 2301193 × 15799367012336491417<20> × 242755078511627713091591933221<30> × 583404661652480206661058499237<30> × 31832165679517520595753203434274069882869<41> × 568972471024107865287021434301977158534824481<45> × 976018899777178583048685157391366392501989564850804315522616680951330151922439998743550313385467645217622210507298370454859393732521554238164513836074733328353303582089082120738307995941629680997377109531507054025599740607293<225> |