Enter your digit sum below, and then enter the prime factors in a list separated by commas and press Start Game. Your BINGO card (with the prime factors colored in) and the partitions of your digit sum will show on the screen. Your job is to go through the partitions of your digit sum, listed below, and click PASS if the digits in the partition contain all the entries on the BINGO card, and FAIL if they don't. You can TOSS out all the partitions that have digits greater than 9 by using the Mass Toss button, or just press the TOSS button next to each one. You can also "prune" branches or sub-branches of a set of partitions by hovering and then clicking over the first or second number of the partition. You'll see a bunch of FAILs light up red under the partition. When you've finished or just want to know the results, press the Check Answers button at the top, and each partition will be "graded", and at the bottom, a list of digit combinations that are psi numbers will be shown. For more info, see the game page.