Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 474: | \[{20^{474}-1\over19}\] | 32 × 7 × 127 × 421 × 1423 × 26861 × 185907541 × 7731160503875069<16> × 70844815546026649<17> × 4178614725165165091<19> × 52283868973702536169<20> × 2418007220991138230401<22> × 7012116809755762514267308698568975988864311<43> × 287839480860625993977660952380952380952380952380952380952380952380952380952380952380952380952380952381<102> × [2725175935126648823109651356248981226953235347372622530273498844828262280077600525325370601769283890857466119714190718813969065899365819703906300897433389409<157>] × [67392169759412894194351368164015389267431221928460628999027967603838697956149718811501338158450502893030242511757399258389947525006317288343173547438685413796219955991094929015812587727307101369883227<200>] |