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27121 Search
27121 Search was a Distributed computing project at PrimeGrid, which searched for primes of the form 27•2n±1 and 121•2n±1.
The 27121 site featured a reservation system that made it easy to use PRPnet to reserve tests directly from the PrimeGrid server. PRPnet used LLR or PFGW for testing and reported results back to PrimeGrid.
Results
27121 Search found many top-5000 primes as reported to The Prime Pages. The largest primes found were 121•29584444+1, 121•24553899-1, & 27•23855094-1, which were found on 2020-11-20, 2012-02-26, & 2012-02-28 and weighed in at 2,885,208, 1,370,863, & 1,160,501 digits respectively.
