680123
This number is a prime.
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SUM[i=1..35] {i such that the Woodall number i*2^i - 1 is
prime} = 680123 is the largest known prime partial sum of
this form (as of January 2010). [Post]
Submitted: 2010-02-01 14:50:21; Last Modified: 2010-02-01 14:51:09.
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