Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 415: | \[{5^{415}-1\over4}\] | 11 × 71 × 116201 × 1209311 × 20515111 × 90045041 × 167674286348441<15> × 20498545382037148227331<23> × 1431185706701868962383741<25> × 84340842933027824154067061<26> × 88040095945103834627376781<26> × 496438274988704468110633695016383789211<39> × 8036927143088301433672972663277629226608633888533479807393933052864889428085088211821764213868646438952419731<109> |