Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 220: | \[{16^{220}-1\over15}\] | 5 × 112 × 17 × 23 × 31 × 41 × 89 × 257 × 353 × 397 × 683 × 881 × 2113 × 2971 × 3191 × 47521 × 61681 × 109121 × 148721 × 201961 × 229153 × 48912491 × 89119361 × 119782433 × 2931542417 × 3404676001 × 4278255361 × 43872038849<11> × 415878438361<12> × 3630105520141<13> × 11035465708081<14> × 2546717317681681<16> × 127886114126296744221796660380215073025601<42> × 3959230115153309849247403143218625469852321<43> |