1,979,339,339

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Number

$1 \, 979 \, 339 \, 339$ is:

The largest right-truncatable prime number, if $1$ is temporarily considered to be a prime number:
$1 \, 979 \, 339 \, 339$, $197 \, 933 \, 933$, $\ldots$, $19 \, 793$, $1979$, $197$, $19$ are all prime


Also see


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $1,979,339,339$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $1,979,339,339$
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