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# Find Prime Numbers

Every prime number in a range of values will be shown. A prime number is a positive integer, which is divisible only by 1 and by itself. Prime numbers play an important role in number theory and in cryptography. Although for the latter use, very large prime numbers are needed. Here only numbers up to 10^{15} can be calculated.

Example: the prime numbers between 180 and 200 are: 181 191 193 197 199

*At a very wide span or very large numbers, the calculation might take a while.*

See also prime factor calculation.