Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 224: | \[{15^{224}-1\over14}\] | 28 × 7 × 17 × 29 × 113 × 257 × 673 × 1489 × 2129 × 7121 × 66529 × 179953 × 198017 × 1743463 × 2526721 × 10678711 × 12515552561<11> × 766028506097<12> × 4454215139669<13> × 31845722644513<14> × 1038405709913713<16> × 12779004583099009<17> × 21975395880100433<17> × 777453109529036081<18> × 14986572761868048510608408236729729<35> × 98954393269655578041548452418660988822084084457016928961<56> |