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. 2002 Apr 19;296(5567):499-502.
doi: 10.1126/science.1069528. Epub 2002 Mar 14.

Solution of a 20-variable 3-SAT problem on a DNA computer

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Solution of a 20-variable 3-SAT problem on a DNA computer

Ravinderjit S Braich et al. Science. .

Abstract

A 20-variable instance of the NP-complete three-satisfiability (3-SAT) problem was solved on a simple DNA computer. The unique answer was found after an exhaustive search of more than 1 million (2(20)) possibilities. This computational problem may be the largest yet solved by nonelectronic means. Problems of this size appear to be beyond the normal range of unaided human computation.

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