10044...04487 (49-digits)

This number is a prime.

                       100446210 0446310044 6510044661 0044791004 4861004487

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The smallest emirp formed from the concatenation of n consecutive n-digit "4-almost prime" numbers, i.e., {1004462||1004463||1004465||1004466||1004479||1004486||1004487}, (case n=7). [Bajpai]