# About Ed2592 Press

Ed2592 Press is the leading publisher of books for computer science, cryptography, the Internet, and other open systems. We are working on a new catalog (WIP).

We think of our authors as the most valuable part of our business. We respect our readers and consider their interests and preferences every working day. Ed2592 is a small, personal, old-world publisher where an author’s opinion is sought and a reader’s message is answered.

Ed2592 Press’s focus is on computing titles at professional levels. We care about the quality of our books. We work with our authors to coax out of them the best writing they can produce. We consult with technical experts on book proposals and manuscripts, and we may use as many as two dozen reviewers in various stages of preparing a manuscript. The abilities of each author are nurtured to encourage him or her to write a first-rate book.

Our books are designed without gimmicks. Their main goal is elegance and readability–we feel the two are often the same. Our covers are understated, decorated with pictures of worldwide regional dress habits of two hundred years ago.

It is a point of honor, ours, to select authors and content by trying to publish only books that we think are interesting or useful. If we believe in a book, we take the risk of publishing it, and we do not exploit the dreams of aspiring writers to fleece them.

## About the name

“What is the difference between 2592 and 2^5 × 9^2? There is none because 25 equals 32, 92 equals 81 and 32×81 = 2592.
2592 is one of those numbers called **printer error numbers**. The concept is simple. If some digits of a number, without changing their position, are set to exponent without altering the value, then this number is a printer error number.
Thus: *numbers from printing error are different representations of the same number*.

The 2592 puzzle apparently originated with Henry Ernest Dudeney’s 1917 book *Amusements in Mathematics* where it is given as puzzle 115, **“A PRINTER’S ERROR”**:

In a certain article a printer had to set up the figures 54×23, which of course meant that the fourth power of 5 (625) is to be multiplied by the cube of 2 (8), the product of which is 5,000. But he printed 54×23 as 5423, which is not correct. Can you place four digits in the manner shown, so that it will be equally correct if the printer sets it up aright, or makes the same blunder?

The answer is that 25×92 is the same as 2592, and this is the only possible solution to the puzzle.