Although it is suspected that there may be bigger numbers, the largest appears to be 99,355,582,098. The remainder of this article will assume that the reader is familiar with the advanced theory of counting; therefore no discussion on whether or not imaginary numbers such as 25 (or complex numbers such as "Gogal plus one") are the biggest number. The mathematician Euler presented a proof that the largest number was pi to the eleventeenth power, but his proof was found to contain an error years later.