Prime Curios!: 59

59
(just those submitted by Beedassy)

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The number of crystallographic space lattices (or 3-dimensional space groups) that are orthorhombic. [Beedassy]

The smallest prime p such that (p, p + 2) and ((p), (p) + 2) both form twin prime pairs. [Beedassy]

(There are 2 curios for this number that have not yet been approved by an editor.)