Puzzle: Find squares made of two-digit primes


Puzzle: Find squares made of two-digit primes

West London reader Richard England has been looking at the arcane subject of "squares consisting entirely of two-digit primes".

There are very few of these numbers, the lowest being 4,761, which is 692 (primes with a leading zero such as 03 not being taken into account).

Richard's first question is: What is the lowest six-digit square of this type? Then his main problem is: What is the lowest eight-digit square that consists of four two-digit primes?

See the answer to find squares made of two-digit primes



Email Alerts

Register now to receive ComputerWeekly.com IT-related news, guides and more, delivered to your inbox.
By submitting your personal information, you agree to receive emails regarding relevant products and special offers from TechTarget and its partners. You also agree that your personal information may be transferred and processed in the United States, and that you have read and agree to the Terms of Use and the Privacy Policy.

This was first published in April 2008


COMMENTS powered by Disqus  //  Commenting policy