Mersenne prime verification is useful for the science field of mathematics, where the results can be used to (in)validate theories and predictions of (Mersenne)

Mersenne prime verification is useful for the science field of mathematics, where the results can be used to (in)validate theories and predictions of (Mersenne) Prime Numbers. Sure, it is a niche with little contact area with the rest of thr world, but so were Elliptic Curves (used in cryptography), Set Theory and Relational Algebra (both heavily used in relational DB technology).