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Single Curio View: (Seek other curios for this number) There are 4 known positive integers n such that the sum of all primes smaller or equal to n divides n(n+1)/2. This sum also divides the sum of all nonprimes smaller or equal to n. Note that 4 is the smallest positive integer with this property. [Capelle]
Submitted: 20090811 01:04:27; Last Modified: 20090811 07:16:02.
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