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This number is a prime.
19 9999999999 9999999979
Single Curio View: (Seek other curios for this number)The only non-titanic prime of form p=2*10^n-n, where n is a composite, (n=21). [Loungrides]
Submitted: 2015-07-19 13:01:34; Last Modified: 2018-12-16 07:42:17.
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