17,163

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Number

$17 \, 163$ (seventeen thousand, one hundred and sixty-three) is:

$3^2 \times 1907$

The largest positive integer which cannot be expressed as the sum of the squares of distinct prime numbers

Also see

• Largest Number not Sum of Squares of Distinct Primes

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $17,163$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $17,163$