However, the search itself does have several practical benefits.
Historically, searching for Mersenne primes has been used as a test for computer hardware.
Earlier this month, GIMPS' prime95 software and members of a German computing community uncovered a flaw in Intel's latest Skylake CPUs.
Prime95 has also discovered hardware problems in many individual's PCs.
As Sys Admin for his charities, he runs Prime95 on all PCs and servers because GIMPS emails him if one doesn't check in, which is helpful for monitoring these remote computers from home or work.
The PC that found the new prime took six days of intense computation on a quad-core Intel i5-6600 CPU to prove the number prime.
With no new, smaller primes found, M(37156667) is officially the "45th Mersenne prime".