TestScoring
From SeventeenOrBust
Until March 2009, primality tests were scored with cEMs which were based on the exponent n of the test in a constant * n3 way. Those cEMs were not very accurate in terms of work done and resulted in a huge credit inflation over time.
After the installment of the new client prime95 in March 2009, the score unit was changed to jEMs, which scores tests at constant * n2 * loglogn. That scoring was then used for all tests done, not just those completed after the change.
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