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Old 2022-01-23, 09:28   #104
Happy5214
 
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"Alexander"
Nov 2008
The Alamo City

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P-1 is useless for Riesel candidates for the reasons bur listed. In fact, your tested B1 of 1M is higher than what GIMPS recommends even for wavefront (i.e. p~105M) Mersenne candidates (which is in the 800k range on my computer). Bounds that high are only used on numbers in the 1.3M-bit range when we're trying to (partially) factor it, not pretest before running a primality test.
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