What is a pentrillion?

Answer 1

A pentrillion is a numerical term that typically represents 10^15 in the short scale system, which is commonly used in the United States and modern English-speaking countries. In the long scale system, used in some European countries, it refers to 10^30. However, "pentrillion" is not widely recognized or used in formal mathematical contexts, as it is less common than other large number names like trillion or quadrillion.