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Single Curio View: (Seek other curios for this number) The number of prime knots with 13 crossings: 9988 = 2^2 * 11 * 227, so 13 is the sum of two smaller unique prime factors. [Post]
Submitted: 2009-09-19 16:14:40; Last Modified: 2009-09-19 19:16:08.
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