20261
This number is a prime.
Just showing those entries submitted by 'Kilpatrick': (Click here to show all)
The smallest five-digit prime ABCDE for which the all of
the following are also prime: ABCD + E; ABC + DE; AB + CDE;
A + BCDE; AB + CD + E; A + B + C + D + E. [Kilpatrick]
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