26,072,323,311,568,661,931

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Number

$26 \, 072 \, 323 \, 311 \, 568 \, 661 \, 931$ is:

$3 \times 577 \times 14 \, 327 \times 1 \, 051 \, 301 \, 790 \, 863$

The first of $5$ integers which have the property that the sum of any $3$ of them is square:

$\ds \qquad \ \ $

$\ds 26 \, 072 \, 323 \, 311 \, 568 \, 661 \, 931$

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$\ds 43 \, 744 \, 839 \, 742 \, 282 \, 591 \, 947$

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$\ds 118 \, 132 \, 654 \, 413 \, 675 \, 138 \, 222$

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$\ds 186 \, 378 \, 732 \, 807 \, 587 \, 076 \, 747$

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$\ds 519 \, 650 \, 114 \, 814 \, 905 \, 002 \, 347$

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1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $26,072,323,311,568,661,931$