7
This number is a prime.
Single Curio View: (Seek other curios for this number)
The number of ways that primes can be written as the sum of
one or more distinct natural numbers less than or equal to
4. That is to say {2}, {3}, {1+2}, {1+4}, {2+3}, {3+4}, {1+2+4}. [Deutsch]
Submitted: 2013-04-16 19:45:28; Last Modified: 2019-02-02 16:45:33.
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