is 2 1990273 - 1
has 599132 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC781CD9B30CE36D3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual270120.059270.0000 %1000000300000000.24604.7501 %120.305271.4250 %
Target2620.308766.1290 %80005000000.00331.1985 %0.312066.5350 %
Difference+8+119.7505+3.8710 %+992000+29500000+0.2427+3.5516%+119.9932+4.8901 %

Known prime factors (1 factor, 78.6 bits, 0.00395058% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19902734668403120949649244719832478.627117280471597354967
11 × 1523 × 6619 × 1057646981
2014-02-196619105764698130,7585.494310.261

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-02kurlyslice10000003000000012--0.2039.657%


Trial Factoring results:
5758596061626364656667686970
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-02ANONYMOUSv4_computers212580.019
2022-03-09LordJuliusManual testing21260
2009-12-12S485122USB-W2602610.077
2011-05-03XyzzyManual testing2612620.154
2011-05-03XyzzyManual testing2622630.493
2011-05-03XyzzyManual testing2632640.986
2011-05-03XyzzyManual testing2642651.877
2014-01-04Never Odd Or EvenManual testing2652663.755
2014-01-04Never Odd Or EvenManual testing2662677.509
2014-01-04Never Odd Or EvenManual testing26726815.02
2014-01-04Never Odd Or EvenManual testing26826930.04
2014-01-04Never Odd Or EvenManual testing26927060.07


ECM factoring results:
Total ECM effort:25.872 GHz-days
Estimated T-Level:25.328
DigitsB1CompleteFacMiss
201100010.8970.002%
25500001.02935.730%
302500000.06693.647%
3510000000.00399.691%


ECM Summary

B1B2factorcurvesGHz-days
10.073
500005000000191.396
50000647061170.575
50000675000070.694
50000677670970.588
50000704187870.599
50000750000021621.95


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13ANONYMOUSv4_computersC781CD9B30CE36D30.131


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-0
466840312094964924471983
17531C4925FEE544
2017-11-12kkmrkkblmbrbkc4.xlarge
466840312094964924471983
17531C4925FEE544


CERT results:
No CERT results for M1990273


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.33 ~= 68-bit
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Last modified: 2024-02-09T03:30:02+00:00