Treebeard's Homepage : Stumpers

Treebeard's Stumper
10 Jan 97

1997 promises to be a PRIME new year, since 1997 is the 302nd prime number (divisible only by 1 and itself), and:

          -       1997            (prime)
          1        997            (a unit and a prime) *
          19        97            (two more primes
          199        7            (two more primes)
          1997       -            (still prime)

So, when is the NEXT year with this property?

* Technically 1 isn't prime, but it's close enough! Consider this two primes for the stumper.

Answer


last modified .

Marc Kummel / mkummel@rain.org