Number Gossip

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Unique Properties of 71

  • 71 is the only two-digit number n such that (nn-n!)/n is prime
  • 71 is the largest of the supersingular primes, i.e., the set of primes that divide the group order of the Monster group

Rare Properties of 71

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Common Properties of 71

Deficient
Evil
Odd
Prime
Square-free
Twin