Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 188: | \[{16^{188}-1\over15}\] | 17 × 257 × 283 × 2351 × 3761 × 4513 × 3308801 × 3853249 × 13264529 × 1198107457 × 7484047069<10> × 23592342593<11> × 165768537521<12> × 140737471578113<15> × 4501946625921233<16> × 181352306852476069537<21> × 487073399939357470433<21> × 163875530636702837695009<24> × 2673989784183378728255297<25> × 220079330589145989807908723201<30> |