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April 18, 2015

April 18, 2015

Posted by **quita** on Wednesday, November 29, 2006 at 12:39pm.

I'm not sure what you want. 400 is a three-digit number, and 4000 is a four-digit number. I don't think you want a "400 digit number."

Assuming you want a number with a value over 400, this site will be helpful:

http://mathforum.org/dr.math/faq/faq.prime.num.html

I hope this helps. Thanks for asking.

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