For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

RSA cryptography, which is one of the typical public key cryptosystems, is a cryptosystem based on the fact that it is difficult to factor a composite number with a large number of digits into prime ...

A 300-billion-digit number is the biggest known pseudoprime, a number which looks like a prime but isn’t. The techniques used to find this behemoth could help keep online transactions secure. The ...

To determine if a number is prime, you can use the following steps: (i) Check if the number is greater than 1. Prime numbers must be greater than 1. (ii) Check divisibility: Divide the number by all ...

NORTH CANTON, Ohio -- A computer science professor at the University of Central Missouri this month found the largest prime number ever discovered, at 22 million digits long. That prime number -- ...