Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 87: | \[{4^{87}-1\over3}\] | 3 × 7 × 59 × 233 × 1103 × 2089 × 4177 × 3033169 × 9857737155463<13> × 96076791871613611<17> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 87: | \[{4^{87}-1\over3}\] | 3 × 7 × 59 × 233 × 1103 × 2089 × 4177 × 3033169 × 9857737155463<13> × 96076791871613611<17> |