is 2 1969619 - 1
has 592915 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-L357E331BAD210113double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26715.086168.6567 %1760001727762400.91336.4021 %15.999470.6633 %
Target2620.311966.1290 %80005000000.00331.1958 %0.315266.5341 %
Difference+5+14.7742+2.5277 %+168000+172276240+0.9100+5.2062%+15.6842+4.1293 %

Known prime factors (1 factor, 83.6 bits, 0.00424224% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1969619142187196008596930174460812683.5563609510164366736160
25 × 5 × 19 × 71 × 1759 × 3181 × 2988731
2011-04-22318129887311,390,6830.01580.0290

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-04-22kurlyhex2683.5560.2460.000%
2022-08-16USAFSS6917th_Scty_Sq176000172776240
skipped known factor: 14218719600859693017446081
--0.91310.229%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-27ANONYMOUSv4_computers212580.019
2022-03-09LordJuliusManual testing21260
2010-01-02S485122USB-W2602610.078


ECM factoring results:
Total ECM effort:24.864 GHz-days
Estimated T-Level:25.320
DigitsB1CompleteFacMiss
201100010.6350.002%
25500001.00436.642%
302500000.06493.798%
3510000000.00399.699%


ECM Summary

B1B2factorcurvesGHz-days
50000470000070.476
500005000000161.116
500006540610141.096
50000707125470.569
50000750000021321.61


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26ANONYMOUSv4_computers357E331BAD2101130.130


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-0
14218719600859693017446081
1F5F60153FEE1776
2017-11-12kkmrkkblmbrbkc4.xlarge
14218719600859693017446081
1F5F60153FEE1776


CERT results:
No CERT results for M1969619


P-1 factor-bounds graph:
B1 = 176000, B2 = 172776240 (P-1 stage 2)
B1 = 176000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.32 ~= 68-bit
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00