Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 312: | \[{28^{312}-1\over27}\] | 3 × 5 × 132 × 29 × 53 × 79 × 157 × 271 × 313 × 547 × 757 × 1483 × 1951 × 2237 × 7321 × 47221 × 114661 × 284467 × 614657 × 1598039 × 51605161 × 219386077 × 45631002457<11> × 78296083533149<14> × 601352884485289<15> × 4543753614603737<16> × 5935493333359200313<19> × 81923931656777716741<20> × 687858517721621226917<21> × 2485157691702736928051924257<28> × 886440096062065149288338518033<30> × 3398337641329450355189472420954977<34> × 855693576641214248819061279848193953<36> × 187124975263806785749536371019289861477255122040375380193587841<63> × 223973040275351425605924258724941512719278605840074110596359524399637<69> |