is 2 1860737 - 1
has 560138 decimal digits
takes 0.101 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L151448C836ED5093double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26715.968968.6567 %500000150000000.10155.0788 %16.070470.2486 %
Target2610.165165.5738 %90007500000.00391.6329 %0.169066.1359 %
Difference+6+15.8038+3.0829 %+491000+14250000+0.0976+3.4459%+15.9014+4.1127 %

Known prime factors (1 factor, 67.1 bits, 0.00360467% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18607371552706946757112070072167.07341722901913519
32 × 1409 × 3290190199
2015-01-211409329019019917.77314.10126.337

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-01-05markrtiny275000600000012--0.0467.177%
2016-03-16alpertronManual testing5000001500000012---8.881%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-09ANONYMOUSv4_computers212580.021
2010-04-06Architects CubedManual testing2602610.083
2011-03-08GrunwalderGIMPManual testing212630.858


ECM factoring results:
Total ECM effort:38.873 GHz-days
Estimated T-Level:25.699
DigitsB1CompleteFacMiss
201100015.1950.000%
25500001.68118.619%
302500000.14086.950%
3510000000.00999.060%


ECM Summary

B1B2factorcurvesGHz-days
500005000000362.385
50000500000020.138
50000660000022417.48
250000400000004418.87


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers151448C836ED50930.101


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-0
155270694675711207007
D76A69041E60EF73
2017-11-07kkmrkkblmbrbkold
155270694675711207007
D76A69041E60EF73


CERT results:
No CERT results for M1860737


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
263
261
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00