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Search: Posts Made By: Richard W
Forum: Business 04 April 2014, 10:57 PM
Replies: 22
Views: 53,601
Posted By Richard W
Aha, yes, the top secret "Appendix J" of Simon...

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,...
Forum: Business 04 April 2014, 09:51 PM
Replies: 22
Views: 53,601
Posted By Richard W
I'm going to have to go and look up some more...

I'm going to have to go and look up some more maths, because (ahem) the details of how prime numbers are used as cryptographic keys has temporarily slipped my mind, but I may as well ask before I do...
Forum: Business 04 April 2014, 10:05 AM
Replies: 22
Views: 53,601
Posted By Richard W
I hadn't heard the claim as a myth when I read...

I hadn't heard the claim as a myth when I read the book, so it didn't jump out at me, but it does seem a likely origin if it's now something claimed as fact.

In the context of the book, the...
Forum: Business 04 April 2014, 09:19 AM
Replies: 22
Views: 53,601
Posted By Richard W
Even ten years ago, 100 digits wasn't an...

Even ten years ago, 100 digits wasn't an unusually long prime. According to Wikipedia, primes of that length or more were known back in 1952. The current largest-known prime is 17,425,170 digits...
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