BOINC has many projects, several of which are geared towards solving open questions in mathematics
"BOINC superblocks fetch a participant’s BOINC recent average credit, also called researcher RAC. RAC is based on a participant’s earned BOINC credits. !!!>>>*Credits and RAC are defined by BOINC*<<<!!!"
Eventually, credit may reflect network transfer and disk storage as well as computation.
Credit has no monetary or other value; it's just a measure of how much work your computers have done.
Total credit: The total number of Cobblestones performed and granted.
Recent average credit: The average number of Cobblestones per day granted recently. This average decreases by a factor of two every week.