100011710001211000133

This number is a prime.

1 0001171000 1211000133

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

Submitted: 2004-10-04 08:06:40; Last Modified: 2008-01-30 17:28:00.