245
This number is a composite.
Just showing those entries submitted by 'Gaydos': (Click here to show all)
245, 246, and 247 are the smallest three consecutive
composite numbers whose concatenations of prime factors in
ascending order (577, 2341, and 1319) are prime numbers. [Gaydos]
(There is one curio for this number that has not yet been approved by an editor.)
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