444444
This number is a composite.
The smaller of two 6-digit repdigit numbers such that the product of itself and all truncations of itself plus one is prime, i.e., 444444*44444*4444*444*44*4+1=6859617106413367297. The other is 666666. [Loungrides]
The only repdigit number consisting of n 4’s, (n=6), such that the product of itself and all truncations of itself plus one is a non-titanic prime. [Loungrides]
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