Base 4 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 519: | \[{4^{519}-1\over3}\] | 3 × 7 × 347 × 1039 × 4153 × 730753 × 1505447 × 35374479827<11> × 47635010587<11> × 70084436712553223<17> × 155285743288572277679887<24> × 1643464247728189221623609<25> × 7348400530773377989289144129092395161857<40> × 6502261405915923489627627623244984118579870253401161730049128363<64> × 19709014643115560219397264671577125505264032974428376489237001990435774189483906244488746953221813209<101> |