Patented prime numbers

Probably this is well known. http://www.freepatentsonline.com/5373560.html http://mathworld.wolfram.com/PrimeNumber.html (check (3))

Because of their importance in encryption algorithms such as RSA encryption, prime numbers can be important commercial commodities. In fact, R. Schlafly (1994) has obtained U.S. Patent 5373560 on the following two primes (expressed in hexadecimal notation):

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