11197...99139 (25-digits)

This number is a prime.

                                                 11197 1049990059 3386399139

Just showing those entries submitted by 'Rivera': (Click here to show all)

+ The smallest 25-digit emirp that when arranged in a 5x5 matrix produces twelve 5-digit emirps (5 per row, 5 per column and two main diagonals). Found by Giovanni Resta. [Rivera]

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