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Old 2021-02-24, 16:23   #5
jyb
 
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Aug 2005
Seattle, WA

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Here's another one, though perhaps with the opposite cause. The correct difficulty is 255.99. It looks like in this case Yafu didn't add the leading coefficient at all (255.14 ≈ 245*log_10(11)).
Code:
n: 7384049810391587250211352363287406947175960642669013845450189424529816242856745368078260733462087073764724231472029401134928725306986130695481851831787933178814661362606610448657133293018573723301486442995118362671069447396748839101553572591556351201
# 11^244+7^244, difficulty: 255.14, anorm: 1.75e+031, rnorm: 1.02e+057
# scaled difficulty: 259.44, suggest sieving rational side
# size = 1.944e-017, alpha = 0.000, combined = 7.014e-014, rroots = 1
type: snfs
size: 255
skew: 1.0946
c5: 7
c0: 11
Y1: -256923577521058878088611477224235621321607
Y0: 1067189571633593786424240872639621090354383081702091
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