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1962*1962!  1 is prime.
[Firoozbakht]
p = 1*9*6*2 + 1 is the largest prime factor of 1962 & 1962 = p*(1+9+6+2). Note that 1962 is the only even number with this property and also there exists only one odd number with this property. [Firoozbakht]
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