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Template:PROD2 Template:PROD2 Giggol is equal to {10,100,2} in BEAF, or 10 tetrated to 100.[1] Thus, it is equal to 10010 = 1010...1010, where there are 100 tens. The term was coined by Jonathan Bowers.

This number is also called hectalogue by Sbiis Saibian, and it's equal to E1#100 = E10#99 = E1010#98 in Hyper-E notation.[2][3]

It was the last number listed in Robert Munafo's Notable Properties of Specific Numbers.[4] In February 2013, it was superseded by mega.

Username5243 calls this number doogol, and it's equal to 10[2]100 in Username5243's Array Notation.[5]

DeepLineMadom calls this number quadoogol, and it's equal to 10[4]100 using DeepLineMadom's Array Notation.[6]


Notation Lower bound Upper bound
Arrow notation 10↑↑100
Steinhaus-Moser Notation 98[4] 99[4]
Chained arrow notation 10→100→2
Hyper-E notation E1#100
Hyperfactorial array notation 102!1 103!1
Nested Factorial Notation 98![2] 99![2]
Fast-growing hierarchy f_3(98) f_3(99)
Hardy hierarchy H2)99(30) H2)99(31)
Slow-growing hierarchy gε0[101](10)


  1. Bowers, Jonathan. "Infinity Scrapers". Retrieved January 2013. Check date values in: |accessdate= (help)
  2. Sbiis Saibian, Hyper-E Numbers
  3. Sbiis Saibian's Ultimate Large Numbers List
  4. Notable Properties of Specific Numbers (page 22)
  5. Part 1 - My Large Numbers
  6. DeepLineMadom's googology - Numbers I've coined (Retrieved 4 May 2022)

This article "Giggol" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:Giggol. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.