125

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Conjecture by Zhi-Wei Sun to be the largest power (5³) for which there is no prime between it and the previous power (11²). The other prime gaps between powers are in (2³, 3²), (2⁵, 6²) and (5², 3³). [Caldwell]

Submitted: 2006-05-19 13:49:01; Last Modified: 2008-01-30 17:28:00.