199
This number is a prime.
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Largest known prime partial sum of Dedekind numbers.
Equivalently partial sum of number of monotone Boolean
functions of n variables, or partial sums of number of
antichains of subsets of an n-set: 2 + 3 + 6 + 20 + 168 =
199 is prime. Curously, the first 5 such partial sums are
prime (2, 5, 11, 31, 199), and then no more primes are
known. [Post]
Submitted: 2010-03-22 22:33:49; Last Modified: 2010-03-23 01:13:58.
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