RSA numbers

The RSA numbers are semiprimes (numbers that are the product of two prime numbers) that were given in the non-discontinued. It is believed that factoring large numbers (assuming the factors are similar in magnitude) without a is extremely difficult, which can be useful in cryptography. The RSA numbers range from 100 to 617 digits (2048 bits) in size.

As of 2013, the largest successfully factored is RSA-768, which has 232 digits.