20000...00019 (47-digits)

This number is a prime.

2000003 0000050000 0700000110 0000130000 0170000019

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This is a prime with a prime number of digits formed by concatenating the primes from 2 to 19, inserting a prime number (five) of 0's between each prime. [Hartley]

Submitted: 2003-03-24 08:50:19; Last Modified: 2008-01-30 17:28:00.