+**Graham's Number** is an immense [integer](/wiki/Integer) that arises as an upper bound to a problem in [Ramsey Theory](/wiki/Ramsey_Theory). It is famously one of the largest numbers ever used in a mathematical proof, far exceeding those expressible with standard power notation.
+## See also
+- [Large Numbers](/wiki/Large_Numbers)
+- [Ramsey Theory](/wiki/Ramsey_Theory)
+- [Combinatorics](/wiki/Combinatorics)