is 2 1932439 - 1
has 581723 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-LB16E0C51BC7264A8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.376468.6567%500000150000000.10155.1019%15.477970.2558%1.5991%
PrimeNet2580.019963.7931%80001400000.00122.4624%0.021164.6847%0.8916%
GPU722620.317966.1290%8000900000.00101.1509%0.318966.5188%0.3898%
Difference+5+15.0585+2.5277%+492000+14910000+0.1005+3.9511%+15.1590+3.7370%+3.7370%

Known prime factors (1 factor, 64.3 bits, 0.00332761% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1932439227753945904101128312064.3045892914236985
5 × 1178582847397
2009-08-07511785828473972.07005,051.19,434.1

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:47alpertronManual testing5000001500000012---0.101--5.102%


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


ECM factoring results:

Old Calculation Method

Total ECM effort:20.581 GHz-days
Estimated T-Level:24.446
DigitsB1CurvesCompleteFacMiss
2011000249 / 1002.4908.188%
2550000249 / 2800.88941.030%

New Calculation Method

Total ECM effort:20.581 GHz-days
Estimated T-Level:24.446
DigitsB1CompleteFacMiss
201100010.3140.003%
25500000.97337.791%
302500000.06293.989%
3510000000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000070.293
500005000000251.738
500005642923141.023
50000750000021017.53


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersB16E0C51BC7264A80.105


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T01:22:42Oliver KruseGTX-0
22775394590410112831
ED44857A5EE719__no
2017-11-10T23:20:12kkmrkkblmbrbkold
22775394590410112831
ED44857A5EE719__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
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105
106
100
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1010
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TF factor-bounds graph:
267
258
250
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2100
Last modified: 2022-02-24T18:52:17+00:00