is 2 8868361 - 1
has 2669643 decimal digits
takes 2.316 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LEFC6D2BC4A77B4AAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.350664.1791 %400003100000.02071.6915 %3.371364.7850 %
Target2686.721164.7059 %5500060000000.14352.3041 %6.864565.5191 %
Difference-1-3.3705-0.5268 %-15000-5690000-0.1227-0.6126 %-3.4933-0.7341 %

Known prime factors (1 factor, 66.9 bits, 0.00075482% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
88683611415461839090570025912166.9407980402687095
5 × 29 × 31 × 43 × 83 × 497449
2011-11-28834974493.31950.01030.0192

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-01-25ANONYMOUSv4_computers40000310000--0.0211.477%
2011-11-28James HeinrichQ66002166.9400.1330.000%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-28ANONYMOUSv4_computers212620.035
1999-03-01ANONYMOUSv4_computers212630.111
1999-12-08ANONYMOUSv4_computers212640.221


ECM factoring results:
No ECM results for M8868361


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-05-24ANONYMOUSv4_computersEFC6D2BC4A77B4AA2.316
2003-03-07ANONYMOUSv4_computersEFC6D2BC4A77B4AA2.316


PRP results:
dateuseridcompidcofactorsres64
2019-03-08artorollofourth
141546183909057002591
79223DDF8E3F5108
2020-09-17kutensryzen3
141546183909057002591
79223DDF8E3F5108


CERT results:
dateuseridcompid
2020-09-17Ben Deloi-09139996565cf3366


P-1 factor-bounds graph:
B1 = 40000, B2 = 310000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
TF factor-bounds graph:
264
263
262
this exponent TF target: 68
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00