PrimeGrid: GFN-Short is... not so short anymore

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The GFN-Short project has completed its double-checking diversion and has moved on to its next and permanent n-range: n=21 (2097152) These tasks are HUGE. Not quite as large as the world record tasks, but still very large. Calling them "Short" would make even an advertising executive blush. So "Short" is out. This is now the "GFN-21" project. Expect run times to be about 15-20 hours for a fairly fast GPU (and just under 10 for the very fastest). Expect about 75 hours for FMA3 capable Haswell CPUs, and about 130 hours for fast modern CPUs without AVX (which unfortunately includes all AMD CPUs, since their AVX instruction set is almost useless.) Time estimates are based on a single task running, so expect somewhat longer times if you're loading up all the cores. And, as always, your mileage may vary. Also, expect run times to grow relatively quickly as 'b' grows in magnitude. The deadline for these tasks is currently a whopping 42 days -- much longer than the times mentioned above for relatively modern computers. Slow computers, old computers, part time crunchers, and so on should still be able to meet the deadline. Once we release the "deadline extension" version of the Genefer app we'll lower the deadline which will give us a faster turnaround for abandoned tasks. At the current time, this temporarily leaves us without any true short GFN tasks on the BOINC server, but we will be opening up additional n-ranges in the near future with a wide range of much shorter tasks. Happy crunching! (All things GFN can be discussed here: http://www.primegrid.com/forum_forum.php?id=75)

More... (http://www.primegrid.com/forum_thread.php?id=6439)