1729
This number is a composite.
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Schiemann's first pair of isospectral lattices L+(1,7,13,19) and L-(1,7,13,19) are of determinant 1*7*13*19 = 1729. [Poo Sung]
Submitted: 2003-04-25 17:21:46; Last Modified: 2008-01-30 17:28:00.
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