is 2 1939039 - 1
has 583709 decimal digits
takes 0.105 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5D5C765B02DD6B1Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.324068.6567%500000150000000.10155.1040%15.425570.2565%1.5998%
PrimeNet2580.019863.7931%80001400000.00122.4641%0.021064.6853%0.8922%
GPU722620.316866.1290%8000900000.00101.1517%0.317866.5191%0.3901%
Difference+5+15.0072+2.5277%+492000+14910000+0.1005+3.9523%+15.1077+3.7374%+3.7374%

Known prime factors (1 factor, 61.0 bits, 0.00314752% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
193903923570086283688951531961.032607777519784
23 × 75972189973
2009-08-108759721899730.2710325.60608.13

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:41:34alpertronManual testing5000001500000012---0.101--5.104%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21258--0.020--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.005 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:20.005 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
201100010.3240.003%
25500000.96538.082%
302500000.06194.040%
3510000000.00399.711%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000292.016
500006600000816.356
500006750000141.110
50000750000012610.52


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computers5D5C765B02DD6B1B0.105


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T02:40:33Oliver KruseGTX-1
2357008628368895153
98730D34456F7A__no
2017-11-11T07:13:32kkmrkkblmbrbkold
2357008628368895153
98730D34456F7A__no


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
109
1010
1011
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-03-17T11:24:35+00:00