9331
This number is a composite.
Just showing those entries submitted by 'Firoozbakht': (Click here to show all)
9331 = prime((9*3*3*1)*(9+3+3+1)) - (9*3*3*1)*(9+3+3+1).
Note that 9331 is the smallest number greater than one
with this property. [Firoozbakht]
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