Euler Lucky Number/Examples/41/Mistake

Source Work

1997: David Wells: Curious and Interesting Numbers (2nd ed.):

The Dictionary

$41$

Mistake

[ $x^2 + x + 41$ ] has many further prime values, including $581$, among its first $1000$ values.

This is misworded. $581$ is not itself prime -- it is $581^2 + 581 + 41 = 338 \, 183$ which is prime.

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $41$