Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 322: | \[{21^{322}-1\over20}\] | 2 × 11 × 43 × 47 × 277 × 461 × 599 × 631 × 691 × 3319 × 19597 × 36709 × 3570659 × 81867661 × 4897051993<10> × 28514133943<11> × 32792468187424849<17> × 2215825387044753577<19> × 139870566115103282847737<24> × 70508844385268946126529487<26> × 10691690931218936036951231691349<32> × 989841672456580427804885218352119985137687<42> × 19527664822346443228748973869572070909123582858479071409999979815929801049293816407083453837<92> × 1327736582010638584787882431179933347851399932798896872260271819633953433512254832656704772297763062803347217513<112> |