Reversible Logic Synthesis Benchmarks Page

Function xor5 (.pla file) has 5 inputs and 1 output. Its output is EXOR of all its variables.
 

Picture	Machine-readable version	Model	Garbage	Gate count	Quantum cost	Author(s)	Date
here	here	NCT	4*	4*	4*	common sense	N/A

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* - the number was shown to be minimal