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Old 04 April 2014, 09:57 PM
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Richard W Richard W is offline
Join Date: 19 February 2000
Location: High Wycombe, UK
Posts: 26,441

Originally Posted by Steve View Post
... and then [redacted]
Aha, yes, the top secret "Appendix J" of Simon Singh's The Code Book. As he says, "Working this out directly on a calculator is not straightforward". And he's talking about the encryption!

So yes, you need two large primes - and knowing one of those large primes would certainly help. Although probably not enough to let you work it out on your calculator.
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