Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 448: | \[{15^{448}-1\over14}\] | 29 × 7 × 17 × 29 × 113 × 257 × 449 × 673 × 1489 × 2129 × 2689 × 7121 × 66529 × 179953 × 198017 × 1743463 × 2526721 × 7422913 × 10678711 × 18575873 × 7526174209<10> × 12515552561<11> × 766028506097<12> × 1391359510721<13> × 4454215139669<13> × 31845722644513<14> × 1038405709913713<16> × 1678616185076993<16> × 12779004583099009<17> × 21975395880100433<17> × 777453109529036081<18> × 1276075848889547777<19> × 5765807395792521302977<22> × 14986572761868048510608408236729729<35> × 840823571873852368433492650370132913089<39> × 148106890088906341476317549488168025552023568833<48> × 98954393269655578041548452418660988822084084457016928961<56> × 51888305779168062021647853191212449966255977142044710920411705050073342058610177<80> |