2468642135797531
This number is a prime.
246864 2135797531
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A prime formed from the concatenation of an all-nonzero-even-digits palindrome (in strictly increasing then decreasing order) followed by an all-odd-digits palindrome (in strictly increasing then decreasing order). [Silva]
Submitted: 2009-09-11 00:34:56; Last Modified: 2009-09-11 02:25:24.
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