Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 390: | \[{31^{390}-1\over30}\] | 25 × 3 × 5 × 72 × 11 × 19 × 41 × 792 × 131 × 157 × 331 × 521 × 911 × 1951 × 2521 × 13807 × 17351 × 17863 × 21821 × 39703 × 42407 × 238213 × 2426789 × 7908811 × 35956831 × 197271101 × 327412201 × 31035996941<11> × 617235858721<12> × 880374069121<12> × 42716694944587<14> × 188431581362701<15> × 5979236519649901<16> × 9708046814116951<16> × 175500339130677572941801<24> × 17123370267331917425544180721<29> × 1129363636895809892086303692627113871721<40> × 597342109473016326462616945691752077270495871<45> × 29510535204545262157687088665468191183896988343413667225871<59> × 131353070873400067498714176936971703863744634164790506746146885289021<69> × 6897884150241136983696395623521191487263725292759985820983608940598827800118779819131106087373200998607468502771428202022591<124> |