11111...11111 (10000-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

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The number (10¹⁰⁰⁰⁰ - 1)/9 + 7*10⁸⁸⁵ is probably the smallest gigantic near-repunit prime. [Wesolowski]

Submitted: 2009-11-07 17:24:01; Last Modified: 2009-11-07 18:31:44.