A googolplex is the number 10^googol, i.e. Failed to parse (Missing texvc executable; please see math/README to configure.): 10^{(10^{100})} . In pure mathematics, the magnitude of a googolplex could be related to other forms of large number notation such as tetration, Knuth's up-arrow notation, Steinhaus-Moser notation, or Conway chained arrow notation.

In 1938, Edward Kasner's nine-year-old nephew, Milton Sirotta, coined the term googol, then proposed the further term googolplex to be "one, followed by writing zeroes until you get tired". Kasner decided to adopt a more formal definition "because different people get tired at different times and it would never do to have Carnera be a better mathematician than Dr. Einstein, simply because he had more endurance and could write for longer". It thus became standardized to Failed to parse (Missing texvc executable; please see math/README to configure.): 10^{(10^{100})} .

In the PBS science program Cosmos: A Personal Voyage, Episode 9: "The Lives of the Stars", astronomer and television personality Carl Sagan estimated that writing a googolplex in standard form (i.e., "10,000,000,000...") would be physically impossible, since doing so would require more space than the known universe provides.

Carl Edward Sagan ( /ˈseɪɡɪn/; November 9, 1934 – December 20, 1996) was an American astronomer, astrophysicist, cosmologist, author, science popularizer, and science communicator in astronomy and natural sciences. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. He advocated scientifically skeptical inquiry and the scientific method, pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence (SETI).

Sagan is known for his popular science books and for the award-winning 1980 television series Cosmos: A Personal Voyage, which he narrated and co-wrote. The book Cosmos was published to accompany the series. Sagan wrote the novel Contact, the basis for a 1997 film of the same name.

Carl Sagan was born in Brooklyn, New York, to a Ukrainian Jewish family. His father, Sam Sagan, was an immigrant garment worker from Kamenets-Podolsk, Ukraine; his mother, Rachel Molly Gruber, a housewife. Carl was named in honor of Rachel's biological mother, Chaiya Clara, in Sagan's words, "the mother she never knew." Sagan graduated from Rahway High School in Rahway, New Jersey, in 1951.

Lawrence Ivor (Jack) Pearson (25 January 1922 — 1 October 2007) was an English cricketer who played first class cricket for Derbyshire in 1946.

Pearson was born at Darnall, Sheffield. He began playing for Derbyshire in July 1945 before the County Championship came back after the Second World War. He made his debut for Derbyshire in the 1946 season in a match against Glamorgan in August. He played one more first class match in the same month which was his last for Derbyshire.

Pearson was a left-handed batsman who played four innings in two first class matches with an average of 6.00 and a top score of 18.

Pearson died at the ade of 85 at Sutton-in-Ashfield, Nottinghamshire.