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Biggol is equal to $$\{10,10,100,2\}$$ or $$10\{\{100\}\}$$10 in BEAF. It was coined by Chris Bird (along with the baggol, beegol, bigol, boggol, and bagol) to compare the boogol with the giggol, gaggol, etc.[1]

Username5243 calls this number Dukiloogol (formerly Dumegoogol), and it's equal to $$10[0,2]100$$ in Username5243's Array Notation.[2]

Biggol can be computed in the following process:

• $$a_1 = 10$$
• $$a_2 = \{10,10,99,2\}$$
• $$a_3 = \{10,a_2,99,2\}$$
• $$a_4 = \{10,a_3,99,2\}$$
• etc.
• Biggol is equal to $$a_{10}$$.

## Etymology

The name of the number is based on Latin prefix "bi-" and the number "giggol".

## Approximations

Notation Approximation
Bird's array notation $$\{10,10,100,2\}$$ (exact)
Hyper-E notation $$E10\#\#10\#\#101$$
Chained arrow notation $$10 \rightarrow 10 \rightarrow 10 \rightarrow 100$$
Strong array notation $$s(10,101,1,3)$$
Fast-growing hierarchy $$f_{\omega 2}(100)$$
Hardy hierarchy $$H_{\omega^{\omega 2}}(100)$$
Slow-growing hierarchy $$g_{\varphi(1,99,0)}(100)$$

## Sources

1. Bowers, JonathanInfinity Scrapers. Retrieved January 2013.
2. Username5243. shortened list - My Large Numbers. Retrieved 2017-04-22.

Jonathan Bowers' googol series

Googol series: googol(plex/duplex/triplex/quadraplex/quinplex) · giggol(plex/duplex) · gaggol(plex/duplex) · geegol(plex) · gigol(plex) · goggol(plex) · gagol(plex)
Boogol series: boogol(plex/duplex/triplex) · biggol(plex/duplex) · baggol(plex) · beegol(plex) · bigol · boggol · bagol
Troogol series: troogol(plex/duplex) · triggol(plex/duplex) · traggol(plex/duplex) · treegol · trigol · troggol · tragol
Quintoogol series: quintoogol(plex) · quintiggol · quintaggol · quinteegol · quintigol · quintoggol · quintagol · (sextoogol · septoogol · octoogol)
Goobol series: goobol(plex) · gibbol · gabbol · geebol · gibol · gobbol · gabol
Boobol series: boobol · bibbol · babbol · beebol · bibol · bobbol · babol
Troobol series: troobol · tribbol · trabbol
Gootrol series: gootrol · gitrol · gatrol · geetrol · gietrol · gotrol · gaitrol
Gossol series: gossol(plex) · gissol · gassol · geesol(plex) · gussol
Mossol series: mossol(plex) · missol · massol · meesol · mussol
Bossol series: bossol · bissol · bassol · beesol · bussol
Trossol series: trossol · trissol · trassol · treesol · trussol · (quadrossol · quintossol)
Dubol series: dubol · dutrol · duquadrol · dossol(plex)