1259

This number is a prime.

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The largest concatenate emirp abcd from Ramanujan's classic paper that included a list of fifty-four quaternary (ax2 + by2 + cz2 + du2) "diagonal" quadratic forms representing all integers. [Beedassy]

Submitted: 2014-12-27 08:16:37;   Last Modified: 2020-06-23 11:01:09.
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