Can this be solved with any HP CAS?

09282017, 03:18 AM
Post: #13




RE: Can this be solved with any HP CAS?
(09272017 04:25 PM)Nigel (UK) Wrote: It doesn't take long with pencil and paper either!In case anyone is interested in such a calculatorless solution: 2^6 = 64 = 1 (because 65 = 5 * 13) Squaring that gives 2^12 = 1 This means 2^1000 = 2^(1000 mod 12) = 2^4 = 3 (all calculations are "mod 13" of course) 

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