This number is a prime.

Just showing those entries submitted by 'Deutsch': (Click here to show all)

+ 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]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell