100011710001211000133

This number is a prime.

                                                     1 0001171000 1211000133

+ 100011710001211000133 is the smallest 21-digit prime formed with three successive 7-digit primes. Note that 7 divides 21. [Mortreuil]

+ 100011710001211000133 is the sum of 99987641382 and 1908552172. [Finkelnberg]

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