Pentomino Primes | Home | Your Feedback |

This puzzle is a competition at K.S.O. Glorieux Ronse, Belgium.

Each letter represents a different prime number.

Within the pentomino grid, each row is the product of the two primes to its right.

Furthermore, each pentomino must be occupied by one each of 1,3,5,7,9.

To use the applet, first click it with your mouse to wake it up.

Move the white box around using arrow keys, TAB, and Home and End.

Type digits forming prime numbers at the right. Missing digits are ignored, thus _ 1 5, 1 _ 5, and 1 5 _ are all equal to 15, not 105 or 150. To erase a digit, use SPACE.

They will automatically propagate to other places holding the same letter, and the products will be computed.

A # character indicates an invalid product value (<100, >999, or even digits). You'll have to check for repeats of 1,3,5,7,9 and that your factors are prime yourself.