Thread: Error Codes?
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Old 2011-09-24, 00:26   #2
Mini-Geek
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"Tim Sorbera"
Aug 2006
San Antonio, TX USA

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It's not an error code, it means your P-1 tests used the Brent-Suyama extension, which essentially throws in some extra primes besides those bounded by B1 and B2 for "free" (i.e. little to no extra work). It's done when enough memory is available, and slightly increases the chances of finding a factor.
http://www.mersenneforum.org/showthread.php?t=7031
http://www.mersenneforum.org/showthread.php?t=12335
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