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Algebra-like Permitting Rampant Organic Nicety! Your Mnemonic Sentient!
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APRONYM
purity
80%
UNIT
Use N=-1 or I=1 Two!
Charles H. Montgomery, Jr.
(Integers have 4 categories: 0, Unit (-1 or +1), Prime (an Integer>1 whose only divisors are Itself and 1) and Composite (none of above.)
Science:Mathematics
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