125

This number is a composite.

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125 = 5³ is the number of primes between 19³ and 20³. The content editor of "Prime Curios!" offers $125 to anyone who finds another example where the number of primes between consecutive cubes is also a cube.

Submitted: 2025-09-29 22:04:57; Last Modified: 2025-10-24 19:36:32.