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# 2999

This number is a prime.

Single Curio View: (Seek other curios for this number)

Start with any number greater than 1, and write down all
its divisors, including 1 and itself. Now take the sum of
the individual digits of these divisors. After repeating
the process, you'll eventually get the product of the first
two odd primes (fifteen) or what Dr. Michael W. Ecker
describes as a "mathemagical black hole" with respect to
this particular iteration. Note that Jason Earls of
Blackwell, Oklahoma, found that 2999 is the least prime
that takes exactly fifteen steps to reach the fifteen
black hole.
Submitted: 2006-10-16 19:45:03; Last Modified: 2009-01-04 11:15:03.

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