31111...11111 (89-digits)
This number is a prime.
311111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111
Just showing those entries submitted by 'Loungrides': (Click here to show all)
The largest near-repunit prime p, less than a googol, of
the form p=3111...111. [Loungrides]
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