is 2 1892057 - 1
has 569566 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LADF6B5DC10CDCE5Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.704668.6567%27500060000000.04623.9338%15.750769.8897%1.2330%
PrimeNet2570.010163.1579%90001600000.00143.0357%0.011564.2763%1.1184%
GPU722610.162465.5738%100001600000.00141.7259%0.163866.1679%0.5942%
Difference+6+15.5422+3.0829%+265000+5840000+0.0447+2.2079%+15.5869+3.7218%+3.7218%

Known prime factors (1 factor, 72.1 bits, 0.00381272% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
189205751994604725769551607032272.1391374023211926743
7 × 6895871 × 28464719
2013-10-17689587128464719588.940.63491.1040

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-20T12:20:00markrtiny2750006000000---0.046--3.934%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers21258--0.020--
2010-04-11T14:32:00Architects CubedManual testing260261--0.081--
2011-03-08T05:18:00GrunwalderGIMPManual testing21263--0.844--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.198 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:19.198 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
20110008.5320.020%
25500000.77346.169%
302500000.04895.332%
3510000000.00299.780%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000402.773
50000660000021016.42


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computersADF6B5DC10CDCE5F0.103


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T16:29:18Oliver KruseGTX-0
5199460472576955160703
4FEAF21E464783__no
2017-11-08T21:12:23kkmrkkblmbrbkold
5199460472576955160703
4FEAF21E464783__no


P-1 factor-bounds graph:
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 275000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
267
263
261
258
250
260
270
280
290
2100
Last modified: 2021-11-26T09:16:02+00:00