881
This number is a prime.
Just showing those entries submitted by 'Kilpatrick': (Click here to show all)
The largest three-digit prime of any form ABC such that A +
BC, AB + C, and A + B + C are prime. In the case of 881: 8
+ 81; 88 + 1; and 8 + 8 + 1 are all prime. [Kilpatrick]
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