is 2 168860123 - 1
has 50831963 decimal digits
takes 1,149.187 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual277181.263463.6364 %10000004000000030.83604.3863 %212.099465.2314 %
Target278362.527964.1026 %1000000200000000116.85823.9994 %479.386165.5382 %
Difference-1-181.2645-0.4662 %--160000000-86.0222+0.3869%-267.2867-0.3068 %

Known prime factors (1 factor, 80.7 bits, 0.00004782% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16886012320247556096855233335275612580.7445995363421846860
22 × 5 × 43 × 199 × 6653 × 5265583
2021-08-04665352655831,450.12.89315.2875

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-08-04Tucker KaoDozenal_Behemoth_Lab10000004000000022580.74430.843.999%


Trial Factoring results:
57585960616263646566676869707172737475767778
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-07-08MarzbugWin_7_Box2632640.012
2011-02-18tscc022642650.022
2013-03-24GrunwalderGIMPNumCrunch22652660.044
2015-06-04La GüiraManual testing2662680.266
2015-06-04La GüiraManual testing2682690.354
2015-06-04La GüiraManual testing2692700.708
2018-02-27Oliver KruseManual testing27027689.22
2021-08-02Tucker KaoManual testing27627790.63


ECM factoring results:
No ECM results for M168860123


Lucas-Lehmer results:
No L-L results for M168860123


PRP results:
No PRP results for M168860123


CERT results:
No CERT results for M168860123


P-1 factor-bounds graph:
B1 = 1000000, B2 = 40000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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108
TF factor-bounds graph:
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270
269
268
266
265
264
this exponent TF target: 78
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00