https://xkcd.com/2922

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Bonus question: Where is London located? (a) The British Isles (b) Great Britain and Northern Ireland © The UK (d) Europe (or ‘the EU’) (e) Greater London

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        10 months ago

        Then wouldn’t 4 fail the conjecture? 4 = 1+ 3 but 1 is not a prime.

        Nevermind my sleepy self somehow thought 2 isn’t a prime number :)