Base 16 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 255: | \[{16^{255}-1\over15}\] | 3 × 5 × 7 × 11 × 13 × 31 × 41 × 61 × 103 × 137 × 151 × 307 × 331 × 409 × 953 × 1021 × 1321 × 2143 × 2857 × 3061 × 4421 × 6529 × 11119 × 12241 × 13669 × 26317 × 43691 × 51001 × 106591 × 131071 × 550801 × 949111 × 15571321 × 23650061 × 1326700741 × 2949879781 × 611787251461<12> × 15455023589221<14> × 418562986357561<15> × 7226904352843746841<19> × 9520972806333758431<19> × 26831423036065352611<20> × 51366149455494753931<20> × 5702451577639775545838643151<28> × 4251553088834471719044481725601<31> |