If you multiply all primes smaller than 10 million and add one you get a prime of 4,340,852 digits. The last 23 digits are 12222286177766366668971. Don't know how long it took exactly. Less than two hours, obviously.

Up to 100 million should finish in a couple of days. My guess is that the result would have more than the (almost) 13 million digits in the currently largest prime known. The problem is that I would have to mathematically prove my program (as well as the PowerBASIC compiler) for anybody to accept such a number as prime.

## Bookmarks