Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 228: | \[{15^{228}-1\over14}\] | 25 × 13 × 113 × 211 × 229 × 241 × 3877 × 4561 × 13757 × 26297 × 4272113 × 292582141 × 611028193819<12> × 18434831466377<14> × 370649274902657<15> × 439799488353587<15> × 4485532699379697977461729<25> × 835726294918884968025848899<27> × 6969521913939651515520634098282421<34> × 4791776297039163613882173557918886344162302680624952999146595045949908438728138609601<85> |