Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 490: | \[{5^{490}-1\over4}\] | 2 × 3 × 11 × 29 × 71 × 211 × 449 × 491 × 521 × 631 × 4201 × 8821 × 10781 × 19531 × 114661 × 187181 × 5758481 × 15216601 × 49105547 × 85280581 × 1866013003 × 4698932281<10> × 2481357870461<13> × 20334022013834451721<20> × 16650328910366149531471<23> × 194043546506490017613781<24> × 1935635465952890802398761<25> × 227376585863531112677002031251<30> × 2831618864926501222192648515199021<34> × 3129890246814727420720419358593888931<37> × 1098360442691511496324435051973573719721299106911<49> |