is 2 58158493 - 1
has 17507451 decimal digits
takes 123.264 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC4B328C30A308514double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27465.783464.8649 %1000000200000006.25454.4944 %72.037966.4440 %
Target27332.890264.3836 %4000006500000012.04574.0787 %44.935865.8363 %
Difference+1+32.8932+0.4813 %+600000-45000000-5.7912+0.4157%+27.1021+0.6077 %

Known prime factors (1 factor, 83.4 bits, 0.00014346% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
58158493130426982282681187518230812683.431112130641248459780
22 × 3 × 5 × 9397 × 10781 × 18446959
2018-08-20107811844695956,8673.12005.7688

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-01-31moscosodesker810000810000--2.4892.036%
2018-08-20Sid & AndyPterodactyl100000020000000622683.4316.2544.929%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.06000e-5
2000-02-09ANONYMOUSv4_computers212544.13000e-5
2000-06-26ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-05-25ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-11-28ANONYMOUSv4_computers212610.003
2016-02-23Mark RoseManual testing2612630.025
2008-11-12alfaro202632640.032
2008-11-13Sturle Sundehummel.ifi2642650.064
2008-11-14Sturle Sundehaydn.ifi2652670.385
2009-08-02Kegsystealth2672680.514
2011-04-28shaugeManual testing2682717.195
2015-04-22monstManual testing27127324.67
2018-07-31penluManual testing27327432.89


ECM factoring results:
No ECM results for M58158493


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-08-12moscosodeskerC4B328C30A308514123.3


PRP results:
No PRP results for M58158493


CERT results:
No CERT results for M58158493


P-1 factor-bounds graph:
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 810000 (P-1 stage 1)
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108
TF factor-bounds graph:
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this exponent TF target: 73
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00