How many transistors invented?

The transistor, invented in 1947 by John Bardeen, Walter Brattain, and William Shockley, has been produced in the billions since its inception. As of today, it's estimated that trillions of transistors are in use worldwide, especially in modern electronic devices like smartphones, computers, and servers, with some microprocessors containing billions of transistors on a single chip. The continuous miniaturization of transistors has been a key factor in the advancement of technology.