Mathematics: What's special about integers 11 through 20?

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Tuesday, September 6, 2011

What's special about integers 11 through 20?

What's special about integers 11 through 20? http://www.daviddarling.info/encyclopedia/N/numbers_types.html 11 is the smallest repunit prime. http://en.wikipedia.org/wiki/Repunit_prime#Repunit_primes 12 is the smallest abundant number. http://www.daviddarling.info/encyclopedia/A/abundant_number.html... Sign in to see full entry.

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