is 2 1979437 - 1
has 595870 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3AB659C5488CB09Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26715.011368.6567 %100000016851219008.843110.7688 %23.854472.0320 %
Target2620.310466.1290 %80005000000.00331.1971 %0.313766.5345 %
Difference+5+14.7009+2.5277 %+992000+1684621900+8.8398+9.5717%+23.5407+5.4975 %

Known prime factors (2 factors, 132.2 bits, 0.00668115% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19794377836696876781676811859.443197952672320
26 × 5 × 13 × 1213 × 39229
-1213392290.06870.00030.0004
197943782570940899418805953272272.8062085717830358299
311 × 6706488200509
2022-07-043116706488200509545.7934,83565,062

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-08-13USAFSS6917th_Scty_Sq8800095986800
skipped known factor: 783669687678167681
--0.5078.596%
2023-09-01Kevin_961110000001685121900
skipped known factor: 783669687678167681
--8.84315.563%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-27ANONYMOUSv4_computers212580.019


ECM factoring results:
Total ECM effort:25.925 GHz-days
Estimated T-Level:25.330
DigitsB1CompleteFacMiss
201100010.9740.002%
25500001.03735.461%
302500000.06693.604%
3510000000.00399.689%


ECM Summary

B1B2factorcurvesGHz-days
500005000000342.536
50000668547770.672
50000690000010.085
50000715000070.603
50000750000021722.03


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27ANONYMOUSv4_computers3AB659C5488CB09B0.130


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-1
783669687678167681
B4E4669816467AA2
2017-11-12kkmrkkblmbrbkold
783669687678167681
B4E4669816467AA2
2022-07-10kutens
783669687678167681
8257094089941880595327
238B3696A3E24F1B


CERT results:
dateuseridcompid
2022-07-10Kang, Jia-Chenmywins10nchc


P-1 factor-bounds graph:
B1 = 1000000, B2 = 1685121900 (P-1 stage 2)
B1 = 88000, B2 = 95986800 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 88000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.33 ~= 68-bit
250
260
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280
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Last modified: 2024-03-13T02:15:48+00:00