Prime numbers are indeed numbers that are only divisible by themselves and 1. They are considered the building blocks of the number line, as all other numbers are created by multiplying primes together. While mathematicians don’t have a way to predict which numbers are prime, they have discovered some patterns in their distribution. For example, apart from 2 and 5, all prime numbers end in 1, 3, 7 or 9. Mathematicians Kannan Soundararajan and Robert Lemke Oliver of Stanford University in California have also discovered that primes ending in 1 were less likely to be followed by another prime ending in 1. Is there anything else you would like to know about prime numbers?
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