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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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There are in all 173 distinct configurations on a Euclidean plane for the arrangement of 4 circles, not necessarily all identical, not allowing osculations nor three or more common intersection points. [Note configuration here means circle-drawable, not just topologically distinct] [Beedassy]


  Submitted: 2019-04-15 08:02:23;   Last Modified: 2019-04-15 08:52:28.

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