1906
It was calculated that 9^387420489 has 369,693,100 digits.
1977
The infamous Graham's number was defined.
1987
The fast-growing hierarchy was defined.
1996
Robert Munafo's website, one of the earliest large numbers sites, was founded.
2002
TREE(3) was first devised, and also Bowers' array notation was first created.
February 24, 2003
The article on Wikipedia about large numbers was created.
2007
Bowers' array notation was revised so that {a, b} is equal to a^b, not a+b.
January 26, 2007
The Big Number Duel, in which Rayo's number was defined, was held.
April 9, 2008
A joke video was uploaded to YouTube which claimed that the largest number in existence is "e to the power of pi to the power of e to the power of pi, multiplied by 794,843,294,078,147,843,293.7+(1/30). Of course, I would be very depressed if this was actually true, because that number is not even greater than 11^11^11.
December 5, 2008
Googology Wiki was founded.
November 19, 2011
Hyper-E notation
On November 19, 2011, Sbiis Saibian released Hyper-E notation and Extended Hyper-E notation to the public.
January 28, 2014
I created a spreadsheet with the names of the -illions. It was around this time when I began to get interested in large numbers (from December 4 2013 until this time, I was interested in astronomy).
February 3, 2014
I tried to print all zeroes of 101000000, only to realize we would have to replace the paper like 10 times (because it would have taken 287 pages).
March 2, 2014
The value of p(100,000,000,000,000,000,000) (where p is the partition function) was calculated.
April 5, 2014
I first discovered Wolfram Alpha, which is a very useful tool for my large number related calculations.
April 26, 2014
I found out that 2^(10^100) contains exactly 3,010,299,956,639,811,952,137,388,947,244,930,267,681,898,814,621,085,413,104,274,611,271,081,892,744,245,094,869,272,521,181,
861,721 digits, but did not find the leading digits of the number.
May 28, 2014
Creation of Cookie Fonster's website
On May 28, 2014, an Internet user who goes by the screen name Cookie Fonster decided to create a large numbers site.
June 7, 2014
I finally calculated that 2^(10^100) begins with 255178906420018795763280....
June 8, 2014
I calculated the leading digits of 3^(10^100), 6^(10^100), and 19^(10^100).
July 5, 2014
I found that the decimal reptend in 1/3^10^100 begins with 7858742742994...
October 30, 2014
BIG FOOT, the largest number ever defined, was created by LittlePeng9 of Googology Wiki.
May 2015
Around this time, Bowers lost an article that may have solved the mystery of pentational and higher arrays once and for all because of a hard drive crash. Also around this time, I started to get interested in large numbers again after my "break" which lasted nearly 8 months.
June 15, 2015
I first discovered the Alpertron big number calculator, which allowed me to calculate leading digits of numbers such as 3^3^3^3^2 or 2^2^2^2^2^2 that have thousands of digits in the number of digits.
July 4, 2015
I discovered that there is a power of 3 between 10^(10^100) and 1.002*10^(10^100).
August 8, 2015
I first used Mathematica, which allowed me to calculate the leading digits of numbers with millions of digits in the number of digits.
October 17, 2015
I computed that 2[6] ends with ...9341056, and also defined the bigong mega as 15[5].
December 1, 2015
I found the last 8 digits of 2[6]: ...79341056. Also, I computed that the Moser should end in ...301056.
January 1, 2016
Sbiis Saibian's website hiatus
April 19, 2016
Cookie Fonster's website hiatus
On April 19, 2016, the person who identifies as Cookie Fonster announced that he had put his site on "full-out hiatus".
June 2016
I became interested in large numbers a third time, after another break lasting about six months.
July 20, 2016
I calculated the last 120 digits of the triangoogol, which I then called "triangle-hecta".
August 11, 2016
Creation of this website
I created this website, and the first article I wrote was the one on the hyperoperational numbers.
I also found out that 24 and 332 are descending power numbers.
August 15, 2016
I calculated that the grand googolbang has about 4.967*10^201 digits and begins with 1892....
February 22, 2018
I joined the Googology Wiki, and made a blog post about the googolisms I defined based on triangular numbers.