Posts by David Rowley
David Parkinson asked for 6 things people might not know about me.
David Parkinson asked for 6 things people might not know about me. 1 My favourite number is 181 (it is a twin prime, the sum and difference of two c...
David Parkinson asked for 6 things people might not know about me. 1 My favourite number is 181 (it is a twin prime, the sum and difference of two c...
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