is 2 1783799 - 1
has 536978 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAA3C2BB17FBA7572double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.657768.6567%500000150000000.10155.0530%16.759170.2405%1.5838%
PrimeNet2570.010863.1579%80001400000.00122.8126%0.012064.1941%1.0362%
GPU722610.172265.5738%80001300000.00121.4923%0.173466.0875%0.5137%
Difference+6+16.4855+3.0829%+492000+14870000+0.1003+3.5607%+16.5858+4.1530%+4.1530%

Known prime factors (2 factors, 151.1 bits, 0.00846920% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17837994772615177469945031132168.693133776708515644
22 × 127 × 263339977393
2020-03-1812726333997739340.4071,128.62,107.9
178379962933099048775437394665592582.3801764018789358426521
3 × 103 × 133087 × 42895238987
2009-07-0713308742895238987658,552183.85343.36

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1783799300355463685405012966178479988474916788489816746151.073
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:33:36alpertronManual testing5000001500000012---0.101--5.053%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.632 GHz-days
Estimated T-Level:24.571
DigitsB1CurvesCompleteFacMiss
2011000256 / 1002.5607.631%
2550000256 / 2800.91440.015%

New Calculation Method

Total ECM effort:17.632 GHz-days
Estimated T-Level:24.571
DigitsB1CompleteFacMiss
20110009.8460.005%
25500000.91140.211%
302500000.05794.416%
3510000000.00399.732%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000025517.56
50000500000010.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00ANONYMOUSv4_computersAA3C2BB17FBA75720.097


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T14:45:36Oliver KruseGTX-1
6293309904877543739466559
0594E9234F10E6__no
2017-11-05T02:55:20kkmrkkblmbrbkold
6293309904877543739466559
0594E9234F10E6__no
2020-03-18T17:27:08mrh.orgw
477261517746994503113
6293309904877543739466559
7E69063941CB8510no
2020-03-19T17:23:38marssystemsSYSTEM01
477261517746994503113
6293309904877543739466559
7E69063941CB8510no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2020-10-30T10:29:14+00:00