Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 368: | \[{21^{368}-1\over20}\] | 24 × 11 × 13 × 17 × 47 × 277 × 461 × 599 × 691 × 19597 × 42689 × 62897 × 97241 × 300673 × 7522289 × 477045301 × 781621671529<12> × 11918195405621<14> × 2215825387044753577<19> × 139870566115103282847737<24> × 2880257611825611787588723888672769<34> × 16122157179747873899321928032897737<35> × 2641770975903509717963660601029203121<37> × 2390704756837404868702967945816106086453374158469862895908737073<64> × 417684691845539223176544832482607393025468582352759242669118921290163659413011639467221575653312180974702712206241732650703840141390394283703655457971345919330313802145906824458084756370977005921<195> |