Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 660: | \[{15^{660}-1\over14}\] | 25 × 112 × 13 × 23 × 31 × 61 × 67 × 113 × 211 × 241 × 331 × 397 × 463 × 617 × 661 × 859 × 1321 × 1531 × 2333 × 3877 × 4931 × 8537 × 19231 × 19421 × 33601 × 63493 × 131381 × 142111 × 278041 × 1011671 × 1248721 × 39225301 × 363567733 × 552548701 × 706195561 × 3055718821 × 18510347197<11> × 23504771357<11> × 62475406423<11> × 135088596919<12> × 3438685189501<13> × 4969143820807<13> × 6713464194361<13> × 58925748316711<14> × 1758543013624537801<19> × 215930170569290447161<21> × 536554814380116068153<21> × 654726612083455934881<21> × 182421048277554866241038281<27> × 4134133437409562377193865001<28> × 43357704552575193687131810006997961<35> × 9273757272736041033417670310849312570581<40> × 20386196432233434534633115855780569087241<41> × 6945647676947900433490732750682148356329247621161<49> × 12280799626907257732259519604601968471234939012585732801224243979285193111479225123735849609601<95> × 5526326550943313630881080986913489892122765540051912092092307523597041648013995195747570821430130682600135426100040713682644369563672725949034641<145> |