904117
This number is a prime.
Just showing those entries submitted by 'Firoozbakht': (Click here to show all)
904117 = 9!2^2 + 0!2^2 + 4!2^2 + 1!2^2 + 1!2^2 + 7!2^2. Note that 904117 is the only prime number with this
property. [Firoozbakht]
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