Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 152: | \[{15^{152}-1\over14}\] | 26 × 17 × 113 × 229 × 761 × 1489 × 7753 × 13757 × 26297 × 114001 × 4272113 × 18434831466377<14> × 370649274902657<15> × 439799488353587<15> × 4485532699379697977461729<25> × 7092493913552510488131464612408185073473718690120852108452281377629891697<73> |