The biggest number referred to regularly is a googolplex (10googol), which works out as 1010^100
Triopentacontillion, 1E((3E159)+3) Killavecillion, 1E((3E3030)+3) Mejillion, 1E(3E(3E(3,000,000))+3) Bejillion, 1E(3E(3E(6,000,000))+3) Trejillion, 1E(3E(3E(9,000,000))+3) Tejillion, 1E(3E(3E(12,000,000))+3) Pejillion, 1E(3E(3E(15,000,000))+3) Exejillion, 1E(3E(3E(18,000,000))+3) Zejillion, 1E(3E(3E(21,000,000))+3) Yejillion, 1E(3E(3E(24,000,000))+3) Nejillion, 1E(3E(3E(27,000,000))+3) Dakejillion, 1E(3E(3E(30,000,000))+3) Hendejillion, 1E(3E(3E(33,000,000))+3) Dokejillion, 1E(3E(3E(36,000,000))+3) Tradakejillion, 1E(3E(3E(39,000,000))+3) Tedakejillion, 1E(3E(3E(42,000,000))+3) Pedakejillion, 1E(3E(3E(45,000,000))+3) Exdakejillion, 1E(3E(3E(48,000,000))+3) Zedakejillion, 1E(3E(3E(51,000,000))+3) Yodakejillion, 1E(3E(3E(54,000,000))+3) Nedakejillion, 1E(3E(3E(57,000,000))+3) Ikejillion, 1E(3E(3E(60,000,000))+3) Ikenejillion, 1E(3E(3E(63,000,000))+3) Icodejillion, 1E(3E(3E(66,000,000))+3) Ictrejillion, 1E(3E(3E(69,000,000))+3) Icterejillion, 1E(3E(3E(72,000,000))+3) Icpetejillion, 1E(3E(3E(75,000,000))+3) Ikectejillion, 1E(3E(3E(78,000,000))+3) Iczetejillion, 1E(3E(3E(81,000,000))+3) Ikyotejillion, 1E(3E(3E(84,000,000))+3) Icxenejillion, 1E(3E(3E(87,000,000))+3) Trakejillion, 1E(3E(3E(90,000,000))+3) Trakenejillion, 1E(3E(3E(93,000,000))+3) Hotejillion, 1E(3E(3E(300,000,000))+3) Astillion, 1E(3E(3E(3E12))+3) Dastillion, 1E(3E(3E(6E12))+3) Trastillion, 1E(3E(3E(9E12))+3) Tastillion, 1E(3E(3E(1.2E13))+3) Pastillion, 1E(3E(3E(1.5E13))+3) Pastavecillion (yum!), 1E(3E(3E(1.5E13)+30)+3) Exastillion, 1E(3E(3E(1.8E13))+3) Zastillion, 1E(3E(3E(2.1E13))+3) Yastillion, 1E(3E(3E(2.4E13))+3) Nastillion, 1E(3E(3E(2.7E13))+3) Nastihotillion, 1E(3E(3E(2.7E13(+300)))+3) Dakastillion, 1E(3E(3E(3E13))+3) Ikastillion, 1E(3E(3E(6E13))+3) Trakastillion, 1E(3E(3E(9E13))+3) Hotastillion, 1E(3E(3E(3E14))+3) Potastillion, 1E(3E(3E(1.5E15))+3) Lunillion, 1E(3E(3E(3E15))+3)
ACK646 GIJ989 BDC866 In between each space is a new code. KPF958 GUA850 PLL968 Enjoy! LA811Y LJ897 594HJF HHY697 MUN486 HUT845 QRN714 LUM521 DBH897 DDD748 VBJ322 INT729 h35TUX EVILR2 AAB123 A32CAM CBR954 UUU875 EWK785 NBN431 PMN576 ZXNR21 ZZR656 PRX482