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Wow, a backwards prime number - that’s pretty cool! A prime number is a number that can only be divided by itself and one, but a backwards prime number is even more special. It’s a prime number that reads the same forwards and backwards - like the famous ‘101’! These numbers are rare, but they’re out there. So let’s take a closer look at these unique numbers and see what makes them so special.
What Is A Backwards Prime Number? [Solved]
Wow, emirps are pretty cool! They’re primes that are prime when you reverse the digits, but they can’t be palindromic. The first few are 13, 17, 31, 37 and so on. Check out the picture above to see what they look like!
Definition: A backwards prime number is a prime number that reads the same forwards and backwards.
Examples: 11, 101, 131, 151, 181
Properties: Backwards prime numbers are always odd numbers and must have at least three digits in order to be read the same forwards and backwards.
Finding Backwards Primes: To find a backwards prime number, start by finding all of the primes between 100 and 999 (inclusive). Then check each one to see if it reads the same forwards and backwards.
Applications: Backwards primes can be used in cryptography as they are difficult to guess or crack due to their unique properties.
A backwards prime number is a prime number that reads the same forwards and backwards. For example, 11 is a backwards prime number because it’s the same when you read it from left to right or right to left. Pretty cool, huh? There are only twelve of these special numbers, so they’re pretty rare!
