Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 259: | \[{16^{259}-1\over15}\] | 29 × 43 × 113 × 127 × 149 × 223 × 593 × 1777 × 6217 × 25781083 × 184481113 × 231769777 × 616318177 × 2499285769 × 2035259884744589189<19> × 1456235596904319041738812533139<31> × 107636344217840413139193500838915409<36> × 114193878466223527772144221955949216864968539889<48> × 21234370960880098806027750185552713706866970578963970119<56> × 9593963676285821579895400611891812054374771943664575363659273<61> |