A mathematician, with the help of 10,000 computers running around the clock for 549 days, completes one of the world's largest single math computations from Certicom. Notre Dame math whiz cracks ...

Learn how to check divisibility by 13 with Sall's Theorem! This easy-to-follow method helps you determine if a number is divisible by 13 without doing long division. Perfect for math enthusiasts and ...