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Old 04 April 2014, 08:54 PM
Steve Steve is offline
Join Date: 19 October 2002
Location: Charleston, SC
Posts: 4,907

The RSA algorithm for cryptography multiples 2 large primes together to get a larger composite and then [redacted] keeping your banking info safe. But yeah, you might be right that a "famous" prime (like the biggest currently known one) would therefore be useless since people could just try dividing the composite by the known prime.
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