Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 429: | \[{20^{429}-1\over19}\] | 79 × 421 × 661 × 859 × 1171 × 3121 × 142559 × 158731 × 461891 × 9690539 × 1037966360861<13> × 10778947368421<14> × 89069400431539529<17> × 175462044485240500219<21> × 821651084995160038985081<24> × 172311318287603732461390609<27> × 10903579044955440372785727616861<32> × 35990206967222156371667587832089524304326308981058127290969578110524231074711982724530429617137819<98> × [1074459958014084630930036524693128316588785788384639455285403088970773844137713687151370227989559126179472952587976905514402653326215025148273288022481983068850153492102919819756312291215435601897421114248561474282952714063362774971107270753995217462077310546565911081625898331<277>] |