Mersenne: LL & Factoring DE Crediting

[Gordon Spence]

The GIMPS home page explains the following

"Finally, if a factor is later found for a Mersenne number or the
Lucas-Lehmer result is found to be incorrect, then you will "lose credit"
for the time spent running the test."

It is on <www.mersenne.org/top.htm> always struck me as odd I must admit.
At the time the test was done it obviously WAS required, so why the
subsequent penalty when we make advances and can factor much deeper?

regards

Gordon


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