422,481

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Number

$422 \, 481$ (four hundred and twenty-two thousand, four hundred and eighty-one) is:

$3 \times 140 \, 827$

The $1$st positive integer whose fourth power can be expressed as the sum of $3$ fourth powers, thus refuting the Euler Quartic Conjecture:

$422 \, 481^4 = 95 \, 800^4 + 217 \, 519^4 + 414 \, 560^4$

Also see

• Next: Counterexamples to Euler Quartic Conjecture

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $20,615,673$