Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 400: | \[{31^{400}-1\over30}\] | 28 × 52 × 11 × 13 × 17 × 37 × 41 × 101 × 181 × 401 × 409 × 601 × 1129 × 1601 × 1901 × 4951 × 16001 × 17351 × 21821 × 4726301 × 7137001 × 13277801 × 4707206941<10> × 25085030513<11> × 136046551681<12> × 593742117601<12> × 20235942281002951<17> × 74770514303869505101<20> × 727422334085254365392641<24> × 3889436310686727916228493162492361601<37> × 281887891699576309494931758688962111082311886906752520001<57> × 47483779231261290099256100281026289843808996466711880605438574837265334162349717923736143408308492510179545601<110> × 10888841058785379165135033074930482531510446432556005716256305890212098720437308554113716487350938236515028387984222918027494499009908611558051131147530531322337051971240228810870874682056354276187748046146699397941712401<221> |