Base 22 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
64: | \[{22^{64}-1\over21}\] | 5 × 17 × 23 × 73 × 97 × 257 × 449 × 3209 × 2310689 × 3227992561 × 2902518892577<13> × 29571562823949828673<20> × 1193214125190655970497<22> |