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Old 2020-05-18, 08:16   #521
patnashev
 
"Pavel Atnashev"
Mar 2020

1010112 Posts
Default

Sometimes when setting FFT_Increment=1 Gwnum chooses zero-padded FFT which fails immediately.
Code:
./sllr64.3.8.23 -d -q"50873*2^1912945+1" -oFFT_Increment=1
Starting Proth prime test of 50873*2^1912945+1
Using zero-padded AVX FFT length 168K, Pass1=896, Pass2=192, clm=2, a = 3
Iter: 1/1912960, ERROR: ROUND OFF (0.5) > 0.4
Continuing from last save file.
Starting Proth prime test of 50873*2^1912945+1
Using zero-padded AVX FFT length 168K, Pass1=896, Pass2=192, clm=2, a = 3
Iter: 1/1912960, ERROR: ROUND OFF (0.5) > 0.4
Unrecoverable error, Restarting with next larger FFT length...
Continuing from last save file.
Starting Proth prime test of 50873*2^1912945+1
Using all-complex AVX FFT length 192K, Pass1=256, Pass2=768, clm=2, a = 3
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