Quote:
Originally Posted by axn
For the same exponent, double check & frist time LL take the same amount of time (on the same kind of CPU, natch). They're basically the same computation sequence (the random shift count not withstanding).
However, at any given point in time, the exponents given out for first time testing will be much bigger than the ones handed out for doublecheck. Does that answer your question?

Actually, for the current ranges (46M for 1st time LL and 23M for DCs) the time taken for a DC is roughly 1/4 of the time taken for a 1st time LL (1/2 of the iterations, each one done in 1/2 of the time)