90010...00007 (46-digits)
This number is a prime.
900100 0021200032 0011004832 3779319397 8070200007
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A center-deletable prime. In other words, delete the center two digits and this new number is also prime. Repeat this process until only two digits remain. [Patterson]
Submitted: 2003-09-16 16:58:31; Last Modified: 2008-01-30 17:28:00.
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