Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 289: | \[{16^{289}-1\over15}\] | 137 × 953 × 26317 × 43691 × 72251 × 79187 × 131071 × 936361 × 1077971 × 7698961 × 12761663 × 21886549 × 113478990853<12> × 18360250452977<14> × 197766803208315851<18> × 179058312604392742511009<24> × 854096275589539341506608949<27> × 338858733065598401355195539629373089<36> × 9451749810136297910082728291533022318601070087253<49> × 3320934994356628805321733520790947608989420068445023<52> × 398410160527221094178749181184472290805236187881699426313<57> |