is 2 787999 - 1
has 237212 decimal digits
takes 0.016 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
Actual26737.708170.1493 %500000150000000.03744.5753 %37.745471.5150 %
Target2440.000054.5455 %1300025000000.004317.0897 %0.004362.3135 %
Difference+23+37.7081+15.6038 %+487000+12500000+0.0331-12.5144 %+37.7411+9.2015 %

Known prime factors (3 factors, 122.5 bits, 0.01554849% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
787999121351847926.85577
7 × 11
-7111.153e-112.090e-74.126e-7
78799950258576231032.2273189
3 × 1063
2008-07-16310631.227e-91.759e-63.128e-6
787999125179055412896459292063.4417942843545036
22 × 3 × 2137 × 3187 × 97187
2014-10-043187971873.40380.00020.0003

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-10-04alpertronManual testing500000150000001222063.4410.03729.662%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-07-16J FeitsmaManual testing??
32.227
10


ECM factoring results:
Total ECM effort:11.427 GHz-days
Estimated T-Level:25.658
DigitsB1CompleteFacMiss
201100014.8080.000%
25500001.62019.795%
302500000.13287.678%
3510000000.00999.129%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002816.409
25000025000000445.018


Lucas-Lehmer results:
No L-L results for M787999


PRP results:
dateuseridcompidcofactorsres64
2017-09-28Oliver KruseGTX-1
121351847
5025857623
12517905541289645929
0B478423581C5267
2017-10-05Oliver KruseManual testing
121351847
5025857623
12517905541289645929
0B478423581C5267
2017-10-13Oliver KruseThreadripper-PC
121351847
5025857623
12517905541289645929
0B478423581C5267
2017-12-16ATHec2-1xh
121351847
5025857623
12517905541289645929
0B478423581C5267
2020-04-21Oliver KruseAddPrpType5
121351847
5025857623
12517905541289645929
1DD8C57008796D1F


CERT results:
No CERT results for M787999


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
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270
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Last modified: 2024-03-13T02:15:48+00:00