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Ingy döt Net 2023-07-01 11:58:00 -04:00
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NB. factor count is the product of the incremented powers of prime factors
factor_count =: [: */ [: >: _&q:
NB. N are the integers 1 to 10000
NB. FC are the corresponding factor counts
FC =: factor_count&> N=: >: i. 10000
NB. take from the integers N{~
NB. the indexes of truth I.
NB. the vector which doesn't equal itself when rotated by one position (~: _1&|.)
NB. where that vector is the maximum over all prefixes of the factor counts >./\FC
N{~I.(~: _1&|.)>./\FC
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