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Old 2008-04-27, 10:42   #6
robert44444uk's Avatar
Jun 2003
Oxford, UK

2×13×73 Posts

The purpose of option 2 is to virtually guarantee a twin, whereas with picking a single n this is not possible. I would be interested to see how many computer years such an exercise would take, because, testing the option 2 approach at n=71000 will take quite a bit of time so at n=500000 the time must be astronomical. The current record was achieved through good fortune if we look at the statistics.
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