99999...99959 (88-digits)
This number is a prime.
99999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999999959
Just showing those entries submitted by 'Patterson': (Click here to show all)
The largest prime that can be written, one digit per key, on a standard 88-key piano. [Patterson]
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