is 2 55088651 - 1
has 16583337 decimal digits
takes 116.757 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L03312C20CE76BDA7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27469.449364.8649 %585000137475004.00173.9017 %73.451066.2357 %
Target27334.723064.3836 %3600006000000011.09223.9309 %45.815365.7836 %
Difference+1+34.7262+0.4813 %+225000-46252500-7.0905-0.0292 %+27.6357+0.4521 %

Known prime factors:
No known factors for M55088651

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-09Torchwood Institute3570K-black5850001374750012--4.0024.299%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-01ANONYMOUSv4_computers212532.18000e-5
2000-03-01ANONYMOUSv4_computers212544.36000e-5
2000-05-24ANONYMOUSv4_computers212560.000
2001-09-10ANONYMOUSv4_computers212570.000
2002-06-29ANONYMOUSv4_computers212580.001
2008-08-04ANONYMOUSManual testing212640.034
2009-01-05werdwerdusOpteron_1482642650.068
2009-01-14DejmosG2652660.136
2009-01-14Team_Inspectorspudboy22662670.271
2009-07-16PrimeCruncherApollo82672680.543
2011-04-04marvikrinubd2682691.085
2011-05-26Hiroyuki YasuiPen4-Omy2692702.170
2011-09-11TheJudgerManual testing2702714.341
2015-12-10Mark RoseManual testing2712728.682
2016-01-23ANONYMOUSManual testing27227317.36
2019-03-17Luigi MorelliManual testing27327434.73


ECM factoring results:
No ECM results for M55088651


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-06-04ANONYMOUS03312C20CE76BDA7116.8
2020-12-30Across-The-StarsJa03312C20CE76BDA7108.8


PRP results:
No PRP results for M55088651


CERT results:
No CERT results for M55088651


P-1 factor-bounds graph:
B1 = 585000, B2 = 13747500 (P-1 stage 2)
B1 = 585000 (P-1 stage 1)
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108
TF factor-bounds graph:
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271
270
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267
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265
264
258
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253
this exponent TF target: 73
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00